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Authors: Dover, Jim , Tailleur, Irv L. , Dumoulin, Julie A.
Editors:
Date: /2004
Title: Geologic and Fossil Locality Maps of the West-Central Part of the Howard Pass Quadrangle and Part of the Adjacent Misheguk Mountain Quadrangle, Western Brooks Range, Alaska (part 2 of single issue))
MF-2413 , , 76 p., 2 sheets
Host: U.S. Geological Survey Miscellaneous Field Studies Map:
Document Type: Article\Abst.\Chapter\report
Annotation:
UserNote
92AD45B (USGS loc. 11950-SD, also 12464-SD) , Howard Pass , Both samples (92AD45B, 45C) collected along N-S segment of ridge. From a dolomitic brachiopod packstone. (description from Blodgett E&R report of 5/3/94) [Howard Pass B-5. Lat. 68 deg. 29'57" N., Long. 158 deg. 35'35" W. Dolomitic brachiopod packstone. Thin section is dolomite crystal mosaic containing a few silicified bioclasts, including probable brachiopod fragments and crinoid ossicles. Collected from unnamed Devonian limestone, stratigraphically equivalent to 92AD45C but in different facies. These rocks stratigraphically underlie strata at loc. 74; approx. 130 m of total section exposed at the two localities. Heavy-mineral concentrate is chiefly phosphatic brachiopod fragments. Brachiopods of early Eifelian age collected from this locality (see table 3). (description from Dover et al., 2004, p. 43 (Table 1))]; [92AD45B. USGS loc. 12464-SD. Howard Pass B-5. 68°29'58", 158°35'32". Dolomitic brachiopod packstone. Collected from unnamed Devonian limestone, stratigraphically equivalent(?) to 92AD44D and 45C, but in different(?) facies.
Collected north of 92AD44D. (description from Harris E&R reports dated Jan. 25, 1995 (Shipment no. A-95-3a) and March 17, 1995 (Shipment no. A-95-3)]
Schizophoria sp.
Cassidirostrum? sp.
Cupularostrum? sp.
Spinatrypa (Isospinatrypa) sp.
92AD45C (USGS loc. 11951-SD, also 12465-SD) , Howard Pass , Both samples (92AD45B, 45C) collected along N-S segment of ridge. From a limey brachiopod packstone. (description from Blodgett E&R report of 5/3/94) [Howard Pass B-5. Lat. 68 deg. 29'57" N., Long. 158 deg. 35'35" W. Limey brachiopod packstone. Thin section is brachiopod-crinoid wackestone; matrix dolomitized and bioclasts largely silicified. Collection from an unnamed Devonian limestone, stratigraphically equivalent(?) to 92AD45B, but in different facies. Brachiopods of early Eifelian age collected from this locality (see table 3). (description from Dover et al., 2004, p. 43 (Table 1))]; [92AD45C. USGS loc. 12465-SD. Howard Pass B-5. 68°29'58", 158°35'32". Limy brachiopod packstone. Collected from unnamed Devonian limestone, stratigraphically equivalent(?) to 92AD44D and 45B, but in different(?) facies. Collected north of 92AD44D. (description from Harris E&R reports dated Jan. 25, 19995 (Shipment no. A-95-3a) and March 17, 1995 (Shipment no. A-95-93-3)]
Cassidirostrum? sp.
Spinatrypa (Isospinatrypa) sp.
Costacranaena n. sp.
92AD30B (11949-SD, also 12463-SD) , Howard Pass , Sample collected on E-W segment of ridge. Partly silicified brachiopod lime packstone. (description from Blodgett E&R report of 5/3/94)[Howard Pass B-5. Lat. 68 deg. 29'43" N., Long. 158 deg. 34'00" W. Partly silicified brachiopod packstone. Thin section is brachiopod packstone containing crinoid ossicles and gastropods; many bioclasts silicified and matrix largely dolomitized. Collected from unnamed Devonian limestone, about 10 m above 92AD28A-4. Brachiopods of early Eifelian age collected from this locality (see table 3). Heavy-mineral concentrate includes 7 gastropod, 1 ostracode, and 3 tentaculitid phosphatized steinkerns. (description from Dover et al., 2004, p. 45 (Table 1))]; [Howard Pass B-5. 68°29'45", 158°35'10". Partly silicified brachiopod packstone. Collected from unnamed Devonian limestone, about 10 m above 92AD29-8 and slightly lower(?) than 28A-4.
Collected to the west of 92AD28A-4 and -22. (description from Harris E&R reports dated Jan. 25, 1995 (Shipment no. A-95-3a) and March 17, 1995 (Shipment no. A-95-3).]
Spinatrypa (Isospinatrypa) sp.
91JS38 , Howard Pass , Howard Pass B-4. Lat. 68 deg. 19'40" N., Long. 157 deg. 52'35" W. All samples from concretions in uppermost part of Kayak Shale. (description from Dover et al., 2004, p. 66 (Table 3)
Disarticulated valve of a nuculoid pelecypod
Indet. nautiloids
Indet. ammonoids
Angyomphalus (Angyomphalus) sp.
Indet. gastropod with cancellate sculpture
91AK22C , Howard Pass , Howard Pass C-3. Lat. 68 deg. 33'43" N., Long. 157 deg. 30'22" W.* [*latitude/longitude herein corrected from previously published version] Sample 91AK22C taken several meters below 91AK22B and about 30 m above 91Tr39; both radiolarian samples from chert that is lithologically transitional between units lPMap/JlPip. (description from Dover et al., 2004, p. 67 (Table 4))
Radiolarians
91AK22B , Howard Pass , Howard Pass C-3. Lat. 68 deg. 33'43" N., Long. 157 deg. 30'22" W.* [*latitude/longitude herein corrected from previously published version] Sample 91AK22C taken several meters below 91AK22B and about 30 m above 91Tr39; both radiolarian samples from chert that is lithologically transitional between units lPMap/JlPip. (description from Dover et al., 2004, p. 67 (Table 4))
Radiolarians
90AD67G (30944-PC) , Howard Pass , Howard Pass C-3. Lat. 68 deg. 32'55" N., Long. 157 deg. 30'20" W. (description from Dover et al., 2004, p. 4 (Table 2)); [Fifteen-cm-thick, fine-grained, skeletal-packstone textured, limestone turbite bed. Collected 7 m above base of outcrop, 0.35 km west of 90AD66A, on west side of hill at about 830 m elevation; NW1/4 sec. 27, T. 10 S., R. 24 W., lat. 68 deg. 32.92 min., long. 157 deg. 30.1 min., Howard Pass C-3 quadrangle. Submitted as Lisburne Group of the Ipnavik allochthon. (description from Harris 1992 E&R report)]
Conodonts
90AD66A (30943-PC) , Howard Pass , Howard Pass C-3. Lat. 68 deg. 33'00" N., Long. 157 deg. 29'30" W. About 25 percent of specimens have a surficial gray patina suggesting nearby hydrothermal and (or) igneous activity. (description from Dover et al., 2004, p. 68 (Table 4))
Conodonts
90AD64F (30940-PC) , Howard Pass , Howard Pass C-3. Lat. 68 deg. 32'58" N., Long. 157 deg. 29'10" W. Sample taken from 16.5 m below a mafic sill. (description from Dover et al., 2004, p. 68 (Table 4))
Conodonts
91AD6F (31741-PC) , Howard Pass , Howard Pass C-3. Lat. 68 deg. 32'00" N., Long. 157 deg. 34'55" W. From 67-m-thick measured section within unit Mlri; 6F, 5.5 m above base of section and about 0.5 m above mafic sill; 6U, 61 m above base of section. (description from Dover et al., 2004, p. 68 (Table 4)); [Field nos. 91AD6F and 6U are from a measured section 67 m thick of the Lisburne Group in the Ipnavik allochthon; top of section is a prominent bench. Above this is several tens of meters of cover (steep talus slope) then 10-15 m of similar rock that may be another fault slice or a stratigraphic continuation of the section, then Imnaitchiak Chert (green-gray). Field no. 91AD2B from just below Imnaitchiak Chert in sediments laterally equivalent to beds above measured section here, but <0.1 km to south. Measured section on west side of hill 1035 m; section top is <0.1 km northwest of 91AB2B and a few tens of meters lower in the section. Lat. 68°32.0', long. 157°35.0', sec. 32, T. 10 S., R. 24 W., Howard Pass C-3 quadrangle.

Field no. 91AD6F (USGS colln. 31741-PC): From 5.5 m above base of section and about 0.5 m above mafic sill that occurs near base of section. Sample from 30 cm limey interval made up of 2-5 cm beds of silty limestone and micrite (probably redeposited beds); beds are graded and crossbedded. (description from Harris, 1992 E&R report)]

Conodonts
91AD6U (31742-PC) , Howard Pass , Howard Pass , Howard Pass C-3. Lat. 68 deg. 32'00" N., Long. 157 deg. 34'55" W. From 67-m-thick measured section within unit Mlri; 6F, 5.5 m above base of section and about 0.5 m above mafic sill; 6U, 61 m above base of section. (description from Dover et al., 2004, p. 68 (Table 4)); [Field nos. 91AD6F and 6U are from a measured section 67 m thick of the Lisburne Group in the Ipnavik allochthon; top of section is a prominent bench. Above this is several tens of meters of cover (steep talus slope) then 10-15 m of similar rock that may be another fault slice or a stratigraphic continuation of the section, then Imnaitchiak Chert (green-gray). Field no. 91AD2B from just blow Imnaitchiak Chert in sediments laterally equivalent to beds above measured section here, but <0.1 km to south. Measured section on west side of hill 1035 m; section top is <0.1 km northwest of 91AB2B and a few tens of meters lower in the section. Lat. 68°32.0', long. 157°35.0', sec. 32, T. 10 S., R. 24 W., Howard Pass C-3 quadrangle.

Field no. 91 AD6U (USGS colln. 31742-PC): From 61 m above base of section; silty limey bed about 10 cm thick, probably redeposited. (description from Harris, 1992 E&R report)]

Conodonts
91AD2B (31740-PC) , Howard Pass , Howard Pass C-3. Lat. 68 deg. 32'03" N., Long. 157 deg. 34'15" W. From top of Mlri unit, about 0.25 m below contact with overlying Imnaitchiak Chert. The lowermost beds of the Imnaitchiak here consist of white- to light-gray-weathering, light-green to gray chert that produced very poorly preserved radiolarians (91JS28E; USGS DR 1528) of possible Late Paleozoic age. (description from Dover et al., 2004, p. 68 (Table 4)); [Lisburne Group of the Ipnavik allochthon from west side of hill 1035 m, about 2 miles northwest of Mount Bupto and 4 miles due east of Bushy Creek; sample taken at about 945 m elevation (just below prominent bench). Tan-weathering, medium-gray, fine-grained limestone in even beds about 8 cm thick. Section here is limestone interlayered with fine-grained spiculitic mudstone--beds mostly 0.5 to a few centimeters thick. Several samples in this area (90AD61Z, 64F, 67G) produced redeposited Kinderhookian conodonts together with late Osagean (anchoralis-latus Zone) conodonts. The sample was teken from the top of the "Ipnavik Lisburne" in this area and about 1/4 m below contact with overlying Imnaitchiak Chert which, in turn, underlies a mafic sill. From lat. 68°32.0', long. 157°35', sec. 32, T. 10 S., R. 24 W., Howard Pass C-3 quadrangle. (description from Harris, 1992 E&R report)]
Conodonts
78ANk35 , Howard Pass , Howard Pass B-5. Lat. 68 deg. 22'52" N., Long. 158 deg. 38'35" W. Fossils are probably in tectonic inclusions; locality described as melange by collector. (description from Dover et al., 2004, p. 68 (Table 4))[No description given in Nelson and Nelson, 1982; shown as locality 4 of map (Table 1)]
Brachiopods
79ANs25C (10018-SD) , Howard Pass , Interbedded black shale, green-brown graywacke, purple shale, and gray limestone. Lat. 68 deg. 24 min. N., long. 158 deg. 27 min. W., T. 12 S., R. 28 W., elev. 2300 ft., 7.0 km from VABM Apex.(description from Harris E&R report of 10/25/1979) [Dover et al., 2004, p. 68 (Table 4) provide following description: "Howard Pass B-5. Lat. 68 deg. 24'18" N., Long. 158 deg. 27'11" W."][No description given in Nelson and Nelson, 1982, shown as locality 3 of map (Table 1)]
Conodonts
79ANs2E , Howard Pass , Howard Pass B-4. Lat. 68 deg. 24'50" N., Long. 158 deg. 17'10" W. (description from Dover et al., 2004, p. 68 (Table 4))[No description given in Nelson and Nelson, 1982; shown as locality 1 of map (Table 1)]
Radiolarians
84STA04 (29639-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 23' N., Long. 157 deg. 55.8' W. Story Creek Zn-Pb prospect. (description from Dover et al., 2004, p. 68 (Table 4)
Conodonts
91JS35D (31753-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 21'35" N., 158 deg. 08'50" W.* [*latitude/longitude herein corrected from previously published version] Mafic sill at least 7 m thick occurs 5 m above sample site. (description from Dover et al., 2004, p. 68 (Table 4)); Lisburne Group in the Ipnavik allochthon. Sample from a 12 cm band of two alternatining carbonate lithologies: a 0.5-1 cm bedded medium- to dark-gray, fossiliferous limestone containing crinoid debris and spicules and a buff-weathering, medium-gray limestone containing crinoid debris and spicules and a buff-weathering, medium-gray limestone containing dark aligned discontinuous layers suggestive of bryozoan mats. Sample from northeast side of knob at 640 m elevation on ridgeline east of Makpak Creek headwaters. Approximately 1.9 miles north-northwest of peak 1015 (sec. 23), 2.7 miles north-northeast of peak 1205 m (sec. 27), and 0.5 mile west of Noatak Park boundary; lat. 68°21.5', long. 158°08.66', NW 1/4 sec. 10, T. 34 N., R. 3 E., Howard Pass B-4 quadrangle. According to J. Schmidt the outcrop is partly silicified limestone with black "cherty" layers and lenses (most containing spicules) and, buff-weathering partly silified limestone layers. Some of the limestone is crossbedded. Mafic sill at least 7 m thick intrudes section about 5 m above collection site. Very similar to "Ipnavik" Lisburne seen in Rim Butte/Cutaway Fenster area. (description from Harris, 1972 E&R report)]
Conodonts
93Mu78-1 , Howard Pass , Howard Pass B-4. Lat. 68 deg. 22'05" N., Long. 158 deg. 04'52" W.* [*latitude/longitude herein corrected from previously published version] (description from Dover et al., 2004, p. 68 (Table 4)
Brachiopods
79ANs41E (10041-SD) , Howard Pass , Lat. 68 deg. 21 min. N., Long. 158 deg. 16 min. W., T. 34 N., R. 3 E., Howard Pass (B-5) quad., elev. 2080 ft., 3.0 km 142 deg. from VABM Apex. On south bank of creek. (description from Oliver E&R report dated 10/31/79)[No locality description given in Dutro E&R report of 10/31/79] [Dover et al., 2004, p. 69 (Table 4) provides following description: "Howard Pass B-4. Lat. 68 deg. 21' N., Long. 158 deg. 16'15" W. Sample 92ADE (table 1) from approximately this locality contains conodonts of middle Frasnian age."][No description given in Nelson and Nelson, 1982; shown as locality 6 of map (Table 1)]
Corals
Stromatoporoids
79ANs41C (10019-SD) , Howard Pass , Gray limestone pods in mafic volcanic rocks structurally below gabbro. Lat. 68 deg. 21 min. N., long. 158 deg. 15 min. W., T. 34 N., R. 3 E., elev. 1980 ft., 3.5 km 142 deg. from VABM Apex. (description from Harris E&R report of 10/25/1979) [Dover et al., 2004, p. 69 (Table 4) provides following description: Howard Pass B-4. Lat. 68 deg. 20'56" N., Long. 158 deg. 16'00" W."][No description given in Nelson and Nelson, 1982; shown as locality 7 of map (Table 1)]
Conodonts
78ANs205B , Howard Pass , 9 km 015 deg. from inlet to Feniak Lake, elev. 2840, T. 34 N., R. 3 E. (lat. 68 deg. 22 min., long. 158 deg. 20 min.). 8-m thick dark-gray limestone with no megafossils in a 200-m thick sequence of dark-gray pillow basalt. Pillow basalt sequence structurally below the Siniktanneyak mafic/ultramafic complex. Collected by S. Nelson. (description from Harris E&R report of 10/11/1978) [Dover et al., 2004, p. 69 (Table 4) provides following description: "Howard Pass B-4. Lat. 68 deg. 20'42" N., Long. 158 deg. 17' W. Collected from limestone within Copter Peak basalt unit of Siniktanneyak mafic complex."][No description given in Nelson and Nelson, 1982; shown as locality 9 of map (Table 1)]
Conodonts
78AMm-035C , Howard Pass , Alaska, Howard Pass B-5 quad., T. 34 N., R. 2 E.; 68 deg. 21 min. N., 158 deg. 20 min. W.; limestone lenses and pods in basalt, containing rare megafossils. Collector: M. Mullen, 1978. (description from Dutro E&R report of 3/1/1979) [Dover et al., 2004, p. 69 (Table 4) provides following description: "Howard Pass B-4. Lat. 68 deg. 20' N., Long. 158 deg. 19'23" W. Collected from limestone within Copter Peak basalt unit of Siniktanneyak mafic complex."][No description given in Nelson and Nelson, 1982; shown as locality 11 of map (Table 1)]
Corals
Brachiopods
78AMm035D , Howard Pass , 7 km 008 deg. from inlet to Feniak Lake, elev. 2000, T. 34 N., R. 2 E. (lat. 68 deg. 21 min., long. 158 deg. 20 min.). Limestone lenses and pods in pillow basalt. Sequence structurally below the Siniktanneyak mafic/ultramafic complex. Collected by Mile Mullen. (description from Harris E&R report of 10/11/1978 [Dover et al., 2004, p. 69 (Table 4) provides following description: "Howard Pass B-4. Lat. 68 deg. 20' N., 158 deg. 19'23" W. Collected from limestone within Copter Peak basal unit of Siniktanneyak mafic complex."][No description given in Nelson and Nelson, 1982; shown as locality 11 of map (Table 1)]
Conodonts
78AMH-194A , Howard Pass , Alaska, Howard Pass B-5 quad., T. 34 N., R. 2 E.; 68 deg. 21 min. N., 158 deg. 16 min. W; 8 km NNE of inlet to Feniak Lake; interbedded black shale and brown-weathering fossiliferous limestone. Collector: Marti M. Hoare, 1978. (description from Dutro E&R report of 03/01/1979)[Dover et al., 2004, p. 69 (Table 4) provides following description: "Howard Pass B-4. Lat. 68 deg. 19'44" N., Long. 158 deg. 16'16" W.".* (*latitude/longitude herein corrected from previously published version)][No description given in Nelson and Nelson, 1982; shown as locality 10 of map (Table 1)]
Brachiopods
echinoderms
sponge(?)
93Mu80 (32213-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 19'44" N., Long. 158 deg. 16'16".* [*latitude/longitude herein corrected from previously published version] Limestone and shale member of Kayak Shale (Mull and others, 1997) (description from Dover et al., 2004, p. 69 (Table 4))
Conodonts
79ANs31A , Howard Pass , Lat. 68 deg., 20 min. N.; Long. 158 deg., 19 min. W. Gray, green, or black weathering chert and shale, interbedded with fossiliferous shaley limestone. (description from Jones and Murchey E&R report dated 7/1/80) [No locality description given in Dutro E&R report of 10/31/79] [Dover et al., 2004, p. 69 (Table 4) provides following description: Howard Pass B-4. Lat. 68 deg. 19'20" N., Long. 158 deg. 19'05" W."][No description given in Nelson and Nelson, 1982; shown as locality 12 of map (Table 1)]
Pelecypods
radiolarians
79ANs31B , Howard Pass , 30 m thick section of siliceous shale or chert, gray, green and black weathering, interbedded with gray limestone and buff-weathering fossiliferous shaley limestone. Collection is a few meters below overlying brecciated dunite. Megafossils submitted to Dutro. Lat. 68 deg. 20 min. N., long. 158 deg. 19 min. W., T. 34 N., R. 2 E., elev. 2300 ft., 5.9 km 181 deg. from VABM Apex. (description from A.G. Harris E&R report of 10/25/1979)[Dover et al., 2004, p. 69 (Table 4) provides the following description: "Howard Pass B-4. Lat. 68 deg. 19'20" N., Long. 158 deg. 19'05" W."][No description given in Nelson and Nelson, 1982; shown as locality 12 of map (Table 1)]
Conodonts
78ANs-135B , Howard Pass , Alaska, Howard Pass B-5 quad.; T. 34 N., R. 2 E.; 68 deg. 19 min. N., 158 deg. 20 min. W.; 6 km N of inlet to Feniak Lake; purple weathering, laminated, weakly calcareous siltstone interbedded with orange-weathering fossiliferous limestone. Collector: S.W. Nelson, 1978. (description from Dutro E&R report of 3/01/1979)[Dover et al., 2004, p. 69 (Table 4) provides following description: "Howard Pass B-4. Lat. 68 deg. 18'58" N., Long. 158 deg. 18'58" W."][No description given in Nelson and Nelson, 1982; shown as locality 13 of map (Table 1)]
Brachiopods
corals
echinoderms
93Mu73 (32217-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 18.7' N., Long. 158 deg. 05.8' W. Shale member of the Kayak Shale (Mull and others, 1997) (description from Dover et al., 2004, p. 69 (Table 4))
Conodonts
91JS36Z (31754-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 19' N., Long. 158 deg. 04.5' W. Limestone and shale member of the Kayak Shale (Mull and others, 1997); sample from limestone that stratigraphically overlies about 10 m of volcaniclastic rocks (in Kayak Shale) and underlies spiculitic chert (Kuna Formation)(description from Dover et al., 2004, p. 69 (Table 4)); [Unnamed limestone that underlies about 10 m of volcaniclastic rocks; samples from subcrop within rubble zone about 7 m across. Tan-weathering, dark-gray, fine-grained, sandy limestone containing skeletal debris including crinoids. From 680 m elevation on south-trending nose about 1 mile due south of hilltop 1042 m and about 5 miles due east of Makpik Creek, lat 68°19', long. 158°04.5', NE1/4 sec. 25, T. 34 N., R. 3 E., Howard Pass B-4 quadrangle. (description from Harris 1992 E&R report)]
Conodonts
91JS37G (31755-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 17.7' N., Long. 157 deg. 58.8' W. Limestone and shale member of the Kayak Shale (Mull and others, 1997) (description from Dover et al., 2004, p. 70 (Table 4)); [Kayak(?) Shale from rubble and subcrop of crinoidal tan-weathering, medium-gray packstone-wackestone that overlies black silty argillite with 50% silt/sand flasers and laminae and some climbing ripples. On east-trending nose at about 780 m elevation, about 0.5 mile northeast of peak 997 m and 2.5 miles west of Peak 1225 m, lat. 68°17.7', long. 157°58.5', SW1/4 SW1/4 sec. 33, T. 34 N., R. 4 E., Howard Pass B-4 quadrangle. (description from Harris 1992 E&R report)]
Conodonts
92ADo248B (32207-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 20'10" N., Long. 157 deg. 52'58" W. Sandstone member of the Kayak Shale (Mulls and others, 1997)(description from Dover et al., 2004, p. 70 (Table 4))
Conodonts
92ADo316B (32208-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 20' N., Long. 157 deg. 52'30" W."* [*latitude/longitude herein corrected from previously published version] Limestone and shale Sandstone member of teh Kayak Shale (Mull and others, 1997); probably stratigraphically lower than 92AD0248B (loc. 123)(description from Dover et al., 2004, p. 70 (Table 4))
Conodonts
91JS38A (31756-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 19'40" N., Long. 157 deg. 52'35" W. Limestone and shale member of the Kayak Shale (Mull and others, 1997). See table 3 for megafossil data from this locality. (description from Dover et al., 2004, p. 70 (Table 4)); [Kayak Shale, rubble and subcrop of tan-weathering, black, very fine grained limestone associated with black shale that contains concretions with pyrite and megafossils (gastropods and possible goniatites). From about 780 m elevation on south-tranding nose about 1 mile south of headwarters of Safari Creek and about 1.24 miles east of peak 1143 m, lat. 68°19.8', long. 157°52.5', sec. 23, T. 34 N., R. 4 E., Howard Pass B-4 quadrangle. (description from Harris 1992 E&R report)]
Conodonts
91JS38B (31757-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 19'40" N., Long. 157 deg. 52'35" W. Stratigraphically overlies 38A. (description from Dover et al., 2004, p. 70 (Table 4)); [Kuna Formation from same locality as described for 91JS38A. Rubble and low outcrop of buff-weathering, black, finely crystalline limestone associated with black shale and black spiculitic(?) chert. (description from Harris 1992 E&R report)]
Conodonts
92ADo239B2 (32209-PC) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 19' N., Long. 157 deg. 51'10" N.* [*latitude/longitude herein corrected from previously published version] Shale member of Kayak Shale (Mull and others, 1997)(description from Dover et al., 2004, p. 70 (Table 4))
Conodonts
92AD46A (32446-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 27'08" N., Long. 157 deg. 31'02" W. Sample 92AD46A is from strata that structurally underlie 92ADo78 and 79; 46A is 0.5 m below base of Kuna Formation. (description from Dover et al., 2004, p. 70 (Table 4)); [Howard Pass B-3. 68°27'08", 157°31'02". 2-8 cm-thick, even-bedded (locally cross-bedded), medium-dark-gray-gray, light gray-weathering, skeletal lime packstone-grainstone with crinoids and brachiopods. Collected from 0.5 m below top of ~10 m-thick, most northerly outcrop of Lisburne Group ("Ml" unit) overlain by black siliceous mudstone float (Kuna?). Forms a thrust sheet beneath sequence of sandstone and sandy limestone (=samples 92Ado78, 79) of unknown age.
Collected at ~820 m elevation, on northern part of NE-trending (high point = 973 m), ~2 miles east of Bupto Creek and ~3 miles north of Memorial Creek; NE1/4NE1/4 sec. 33, T. 11 S., R. 24 W. (description from Harris E&R report dated March 17, 1995, Shipment A-95-3)]
Conodonts
92ADo79A (32216-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 26'50" N., Long. 157 deg. 31'00" W. Sample 92ADo79A is from approx. 75 m stratigraphically below 92ADo78B (loc. 133)(description from Dover et al., 2004, p. 70 (Table 4))
Conodonts
92ADo78B (33320-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 26'48" N., Long. 157 deg. 30'35" W.* [*latitude/longitude herein corrected from previously published version] (description from Dover et al., 2004, p. 70 (Table 4))
Conodonts
92AD37D (32443-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 24'00" N., Long. 157 deg. 27'10" W. Sample from carbonate thrust beneath (and locally intercalated with?) basal of unit JDbc. (description from Dover et al., 2004, p. 70 (Table 4)); [Howard Pass B-3. 68°24'00", 157°27'10". Nodular-bedded, skeletal lime packstone-grainstone with abundant crinoids interbedded with calcareous and noncalcareous sandstone.
Collected stratigraphically highest(?) part of 5-10 m-thick exposed section in outer part of dip-slope. Rocks structurally and stratigraphically(?) underlie 92AD36 section (contact (not exposed) may be a fault) and look lithologically similar to Utukok Fm. (Early Mississippian) of the Lisburne Group.
Collected from same locality as above ("referring to 92AD36E") except at ~660 m elevation near stream level at another small outcrop ~100 m to the west of 92AD36 section. (description from Harris E&R report dated March 17, 1995)]
Conodonts
91ADo70E (31747-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 22'55" N., Long. 157 deg. 40'50" W. Limestone and shale member of the Kayak Shale (Mull and others, 1977). Sample 91ADo70E is from strata about 20 m structurally (and stratigraphically?) above 91ADo70C (loc. 143). (description from Dover et al., 2004, p.70 (Table 4))
Conodonts
91ADo70C (31748-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 22'52" N., Long. 157 deg. 40'50" W. Limestone and shale member of the Kayak Shale (Mull and others, 1997). (description from Dover et al., 2004, p. 71 (Table 4))
Conodonts
91AD9F (31743-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 23'30" N., Long. 157 deg. 39'15" W. (description from Dover et al., 2004, p. 71 (Table 4)); [Field nos. 91AD9E and 9F from small measured section of "Lisburne Group"--more platformal facies of Lisburne within a section of black shale (Kuna Fm.) Section is 12 m of good cliffy outcrop overlain by about 5 m of rubbly slope. From west side of small knob (about 840 m), 0.3 mile northwest of hill 893 m, about 0.5 mile due east of eastern tributary to Safari Creek, and about 1.5 miles south of headwaters of Buptu Creek, lat. 68°24.0', long. 157°39.0' , sec. 24, T. 12 S., R. 25 W., Howard Pass B-3 quadrangle. Field no. 91AD9F (USGS colln. 31743): About 14 m above base of section, crinoidal packstone. (description from Harris, 1992 E&R report)]
Conodonts
92Mu22 (32210-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 22'30" N., Long. 157 deg. 37'16 N.* [*latitude/longitude herein corrected from previously published version] Limestone and shale member of the Kayak Shale (Mull and others, 1997). (description from Dover et al., 2004, p. 71 (Table 4))
Conodonts
92AD55-0 (32449-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 19'36" N., Long. 157 deg. 45'15" W. About 1 km southwest of type sectionof the Kuna Formation. Sample 55-0 is from near or at top of Rough Mountain Creek unit. (description from Dover et al., 2004, p. 71 (Table 4)); [Howard Pass B-3. 68°19'36", 157°45'15". 4 cm-thick-bedded crinoidal lime grainstone with 1/2 cm-thick partings.
Sample collected from top of Lisburne "platform facies" exposure underlying Kuna Fm. (may not be top of unit, actual contact not exposed). Rocks are similar in facies and stratigraphic setting (and age?) to 91AD9F (USGS colln 31743-PC) which yielded late Famennian through much of Osagean conodonts.
Collected at ~820 m elevation, ~3/4 mile SW of Kuna type section, on west side of Safari Creek, ~2.5 miles west of headwaters of Ipnavik River; SE1/4SE1/4 sec. 20, T. 34 N., R. 5 E. (description from Harris E&R report dated March 17, 1995; shipment no. A-95-3)]
Conodonts
92AD55-22 (32450-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 19'36" N., Long. 157 deg. 45'15" W. About 1 km southwest of type section of the Kuna Formation. Sample 55-22 is from the limestone and shale member of the Kayak Shale, about 12 m below contact with Rough Mountain Creek unit. (description from Dover et al., 2004, p. 71 (Table 4)); [Howard Pass B-3. 68°19'36", 157°45'15". Dark-yellow-orange- to moderate yellow-brown-weathering, skeletal lime wackestone-packstone containing crinoids and brachiopods and interbedded with sandstone, calcareous sandstone, and shale.
Collected 3 m below top of Kayak Shale(?) exposure. ~9 cm of covered interval separates top of highest Kayak(?) exposure from base of "platform facies" outcrop.
From same locality as above ("referring to 92AD55-0"). (description from Harris E&R report dated March 17, 1995, shipment no. A-95-3)]
Conodonts
92AD73G (32462-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 19'38" N., Long. 157 deg. 45'05" W. Structural repeat of section at 92AD55 located 0.2 km to northeast; sample from about 6 m below top of Rough Mountain Creek unit. (description from Dover et al., 2004, p. 71 (Table 4)); [Howard Pass B-3. 68°19'38", 157°45'05" 15 cm-thick bed of skeletal lime wacke/packstone with crinoids and brachiopods.
Collected from isolated outcrop below 92AD55 section (separated by covered interval), ~78 m below top of 92AD55 section (78 m below 55-0) in "Ml" unit of Lisburne Group(?) or Kayak Fm of Endicott Group(?) Section has features of both.
Collected at ~800 m elevation, ~1/4 mile north (and slightly west) of 92AD72-5; SE1/4SE1/4 sec. 20, T. 34 N., R. 5 E. (description from Harris E&R report dated March 17, 1995; shipment no. A-95-3)]
Conodonts
92AD72-5 (32461-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 19'30" N., Long. 157 deg. 44'55" W. From chert-rich outcrop about 5 m below top of Rough Creek unit. (description from Dover et al., 2004, p. 71 (Table 4)); [Howard Pass B-3. 68°19'30", 157°44'55". 2-10 cm-thick beds of skeletal lime wacke/packestone with rugose corals, brachiopods, and crinoids.
Collected from isolated outcrop, ~5 m below top of 92AD55 section of "Ml" unit underlying Kuna Formation in type area.
Collected ~820 m elevation, on small ridge ~1/10 mile east of 92AD55 section and due south of headwaters of Safari Creek; SW1/4SW1/4 sec. 21. T. 34 N., R. 5 E. (description from Harris E&R report dated March 17, 1995; shipment no. A-95-3)]
Conodonts
93JS03E , Howard Pass , Howard Pass B-3. Lat. 68 deg. 20.5' N., Long. 157 deg. 13' W. These authors [note by R.B. Blodgett, referring presumably to Dumoulin and Harris, 1997 and Mull and others, 1997] assign rocks at this locality to the lower part of Isikut unit, several meters above contact with underlying Kanayut Conglomerate. (description from Dover et al., 2004, p. 71 (Table 4)
Conodonts
93Ha109 , Howard Pass , Howard Pass B-3. Lat. 68 deg. 20'24" N., Long. 157 deg. 13'23" W.* [*latitude/longitude herein corrected from previously published version]. These authors (Note by R.B. Blodgett: referring to Mull and others, 1997) assign rocks at this locality to the Isikut unit. (description from Dover et al., 2004, p. 71 (Table 4))
Brachiopods
93Mu63-1 (32202-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 15'29" N., Long. 157 deg. 20'17" W.* [*latitude/longitude herein corrected from previously published version]. From an interval of Rough Mountain Creek unit too small to show on geologic map. (description from Dover et al., 2004, p. 71 (Table 4))
Conodonts
93Mu63-2 (32200-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 15'25" N., Long. 157 deg. 20'20"*.* [*latitude/longitude herein corrected from previously published version]. These authors (Note by R.B. Blodgett: referring to Mull and others, 1997) assign rocks at this locality to the limestone and shale member of the Kayak Shale. (description from Dover et al., 2004, p. 71 (Table 4))
Conodonts
93Ha136 (32194-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 15'22" N., Long. 157 deg. 20'17" W. (description from Dover et al., 2004, p. 72 (Table 4))
Conodonts
brachiopods
93Mu63 (32201-PC) , Howard Pass , Howard Pass B-3. Lat. 68 deg. 15'07" W., Long. 157 deg. 20'10" W. These authors (Note by R.B. Blodgett: referring to Mull and others, 1997) assign rocks at this locality to the limestone and shale member of Kayak Shale. (description from Dover et al., 2004, p. 72 (Sheet 4))
Conodonts
brachiopods
78Tr232A (MR 5436) , Howard Pass , Howard Pass C-3. Lat. 68 deg. 36.5' N., Long. 157 deg. 20.0' W. Sample location approximate; based on latitude and longitude in Murchey and others (1988). (description from Dover et al., 2004, p. 72 (Table 4))
Radiolarians
77AHe56 (MR 0035) , Howard Pass , Howard Pass B-4. Lat. 68 deg. 23.92' N., Long. 158 deg. 05' W. Sample location approximate; based on latitude and longitude in Murchey and others (1988). (description from Dover et al., 2004, p. 72 (Table 4))
Conodonts