Report on Referred Fossils |
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| Stratigraphic range: |
Mississippian and Permian(?) |
| Kinds of fossils: |
Brachiopods |
| Quadrangle or area: |
Point Hope Quad. |
| Shipment No.: |
A-62-3 |
| Referred by: |
Tailleur, I. G.
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| Report prepared by: |
Dutro, J. Thomas, Jr.
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| Date: |
05/31/1968 |
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This report supplements that of Sando and Dutro (5/29/68) and adds information concerning the age and correlation of the Mississippian strata on the Lisburne Peninsula. As indicated by the corals, the lower part of the Cape Dyer sequence is probably correlated with the Lithostrotion aff. L. asiaticum Zone of the central Brooks Range. While some of the brachiopods have a late Osage aspect, the assemblages are all probably of Meramec age (approximate correlative of the Moorefield Shale of Arkansas). This applies to collection 20282-PC upwards through 20290-PC. All of these occur in the lower 300 feet of the sequence. Unfortunately, control on the upper part of the section is less good, but brachiopods like those of the 5th lithologic zone of the central Brooks Range occur in 20292-PC, 20293-PC and 20294-PC. Sando has suggested that the latter collection also is correlative with the 5th zone. This would suggest that the Cape Dyer sequence correlates approximately with the lower Alapah of the central Brooks Range, ranging from the Lithostrotion aff. L. asiaticum Zone in the lower 300 feet to the Goniatites crenistria Zone from 500-700 ft. Further detailed biostratigraphic work is needed to delineate the zonation and correlations. In the Cape Thompson area, presumed Chester equivalents were identified in Ml4 and, perhaps, the scattered collections with Caninia are of this age. One collection, 61ATr110 (20272-PC) is almost certainly Permian in age and supports the field identification as probable Siksikpuk Formation.
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***
Brief statement of problem and remarks (from collector):
61ATr000: Collection from Crowbill Pt. at Chariot site from rocks covered by water after breakup.
Possibly additional faunal data for uppermost part of Lisburne at site (refer to Russ Campbell)
61ATr110F-122F-scattered collections along Ipewik River from upper and lower stratigraphic units of Group for sample of faunal zones represented.
61ATr139F. Collection from near base of upper strat. unit at Cape Dyer for faunal check.
61ATr140-143. Collections from detailed strat. section to establish faunal reference column for lower stratigraphic unit, Cape Dyer. 140cF contains plant fossils as well as invertebrates from tongue of terriginous rocks; should be critical in faunally dating coaly section that underlies Lisburne Group.
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| User Note module to be added |
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61ATr000F
(20271-PC)
, Point Hope
, About 300 ft. below local top of Group. At Crowbill, Chariot site. 68 deg. 06'00" N. lat.; 165 deg. 48'45" W. long. (description from Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "61ATr000: Collection from Crowbill Pt. at Chariot site from rocks covered by water after breakup. Possibly additional faunal data for uppermost part of Lisburne at site (refer to Russ Campbell)... Upper Lisburne from 300 ft. below local top of Group. At Crowbill, Chariot site. Tupik-like facies. 68 deg. 06'00"N lat., 165 deg. 48'45" W long. (14.5, 2.1)"
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echinoderm debris, indet.
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Spirifer aff. S. arkansanus Girty
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trilobite fragment, indet.
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61ATr110F
(20272-PC)
, Point Hope
, West flank of anticlinal nose, most easterly belt of Lisburne cut by Ipewik River south bank. 68 deg. 24'15" N. lat.; 165 deg. 34'15" W. long. (description from Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "Within base? of Siksikpuk fm., within 20 ft. of base of Siksikpuk argillite. Crinoidal and other carbonate believed part of the lower calcarentic-dolomitic zone of Ml4 (Kogruk). Indicates unformableness of Siksikpuk. West flank of anticlinal nose, most easterly belt of Lisburne cut by Ipewik River south bank. 68 deg. 24'15" N. lat., 165 deg. 34'15" long. (7.3, 15.7)"
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echinoderm debris, indet.
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61ATr112bF
(20273-PC)
, Point Hope
, High bluff west bank of Ipewik at beginning of easternmost SE leg of River. 68 deg. 28'22" N. lat.; 165 deg. 36'00" W. long. (description from Dutro E&R report of 5/31/68 and Sando & Dutro E&R report of 5/29/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "Interbedded fine, yellow-orange weathering carbonate and pelitic rocks of Ml3 (Campbell) or Utukok unit. Estimated 400 ft. from gradational zone underlying Kogruk; estimated 400 ft. from base of exposure, faulted on Triassic. Collected from talus representing about 100 ft. Stratigraphic interval. High bluff west bank of Ipewik at begging of easternmost SE leg of River. 68 deg. 24'22"N lat., 165 deg. 36'00" W long. (7.4, 15.5)"
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strophomenoid, indet. (very large form)
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brachiopod fragments, indet.
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61ATr113F
(20274-PC)
, Point Hope
, 3,200 ft. south along strike of same zone as 112b SE bank of curve at end of SE leg. 68 deg. 22'52" N. lat.; 165 deg. 35'15" W. long. (description from Dutro E&R report of 5/31/68 and Sando and Dutro E&R report of 5/29/61 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: 3,200 ft. south along strike of same zone as 112b SE bank of curve at end of SE leg. "68 deg. 23'52"N lat., 165 deg. 35'15" W long. (7.1, 15.5)"
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61ATr113bF
(20275-PC)
, Point Hope
, Low cuts south bank at east end of long west reach of Ipewik. 68 deg. 23'45" N. lat.; 165 deg. 35'25" W. long. (description from Dutro E&R report of 5/31/68 and Sando and Dutro E&R report of 5/29/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "Gradational zone of lutitic and arenitic carbonate at Kogruk-Utukok contact (Ml4-Ml3) up dip from 113. Low cuts south bank at east end of long west reach of Ipewik. 68 deg. 23'45" N. lat., 165 deg. 35'25" long. (7.2, 15.5)"
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61ATr114F
(20276-PC)
, Point Hope
, South bank, east third long west reach of Ipewik. 68 deg. 23'47" N. lat.; 165 deg. 36'00" W. long. (description from Dutro E&R report of 5/31/68 and Sando and Dutro E&R report of 5/29/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "Thick-bedded, light colored arenitic carbonate zone in lower part of Ml4 (Kogruk). South bank, east third long west reach of Ipewik. 68 deg. 23'47" N. lat., 165 deg. 36'00" long. (7.1, 15.5)"
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61ATr114bF
(20277-PC)
, Point Hope
, Small cut, north bank of Ipewik, just east of west end of long west reach. 68 deg. 23'48" N. lat.; 165 deg. 37'15" W. long. (description from Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: Dark, fine carbonate with medium irregular dark chert layers, probably Ml5--Tupik, near local top of Group. Small cut, north bank of Ipewik, just east of west end of long west reach. 68 deg. 23'48" N. lat., 165 deg. 37'15" long. (7.1, 15.4)"
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Bembexia? inumbilicata Yochelson and Dutro
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61ATr119F
(20278-PC)
, Point Hope
, Stream bed, north bank, beginning of south curve at downstream end of exaggerated loop in Ipewik. 68 deg. 22'30" N. lat.; 165 deg. 39'20" W. long. (description from Dutro E&R report of 5/31/68 and Sando and Dutro E&R report of 5/29/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: Dark limestone and chert and coralline limestone near base of upper, dark part of Ml4-Kogruk, perhaps near middle of gross unit. Stream bed, north bank, beginning of south curve at downstream end of exaggerated loop in Ipewik. "68 deg. 22'30" N. lat., 165 deg. 39'20" long. (6.8, 15.2)"
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61ATr122F
(20279-PC)
, Point Hope
, Cliffs-bluffs on north bank of upper third long. 1/3 long west-flowing part of Ipewik above junction with Ipewik River. 68 deg. 21'38" N. lat.; 165 deg. 40'15" W. long. (description from Dutro E&R report of 5/31/68 and Sando and Dutro E&R report of 5/29/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: Thick-bedded, stackmaking carbonate in upper lower dolomitic arenitic part of Ml4-Kogruk. Cliffs-bluffs on north of upper third long. 1/3 long west-flowing part of Ipewik above junction with Ipewik River. "68 deg. 21'38" N. lat., 165 deg. 40'15" long. (6.5, 15.1)"
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61ATr139aF
(20280-PC)
, Point Hope
, 100 yds. north along beach from small stream 1/2 mile south of Cape Lewis. 68 deg. 27'01" N. lat.; 166 deg. 11'37" W. long. (description from Dutro E&R report of 5/31/68 and Sando and Dutro E&R report of 5/29/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: 150 ft. of limestone and shale comparable to Ml3-Utukok but overlying thick unit of medium-bedded carbonate and underlying thicker bedded arenitic carbonate zone. Mapped now as Kugruk-Ml4. 100 yrds. north along beach from small stream 1/2 south of Cape Lewis. "68 deg. 27'01" N. lat., 166 deg. 11'37" long. (12.5, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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fenestrate bryozoan, indet.
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61ATr139bF
(20281-PC)
, Point Hope
, 150 ft. south of creek location 139a. 68 deg. 27'00" N. lat.; 166 deg. 11'36" W. long. (description from Dutro E&R report of 5/31/68 and Sando and Dutro E&R report of 5/29/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "Medium-bedded limestone apparently below 139a, part of unit used as base of Kugruk-Ml4; equivalent of TR143o-pF. 150 ft. south of creek location 139a. 68 deg. 27'00" N. lat., 166 deg. 11'36" long. (12.5, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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echinoderm and bryozoan debris, indet.
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61ATr140aF
(20282-PC)
, Point Hope
, From measured section exposed on cliff at beach about 3/4 mile south of Cape Lewis. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00. (description from Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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echinoderm debris, indet.
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fenestrate bryozoans, indet.
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Leptagonia cf. L. analoga (Phillips)
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Spirifer aff. S. arkansanus Girty
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61ATr140bF
(20283-PC)
, Point Hope
, Same as locality 140a. (according to Dutro E&R report of 5/31/68 [Note by R.B. Blodgett: refers to locality 61ATr140aF]; Locality same as 140dF (according to Sando and Dutro E&R report of 5/29/68)
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fenestrate bryozoans, indet.
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Leptagonia cf. L. analoga (Phillips)
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Spirifer sp. (alate form)
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61ATr140cF
(20284-PC)
, Point Hope
, Same locality as 140a. [Note by R.B. Blodgett: refers to locality 61ATr140aF]
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fenestrate bryozoans, indet.
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pelecypod fragments, indet.
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61ATr140dF
(20285-PC)
, Point Hope
, Same locality as 140a. (from Dutro E&R report of 5/31/68) [Note by R.B. Blodgett: refers to locality 61ATr140aF] Sando and Dutro's E&R report of 5/29/68 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)"
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bryozoan fragment, indet.
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Leptagonia aff. L. analoga (Phillips)
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rhynchonelloid, indet. (perhaps Leiorhynchoidea)
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Echinoconchus aff. E. alternatus (Norwood & Pratten)
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Echinoconchus sp. (small)
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Spirifer aff. S. arkansanus Girty
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61ATr143a-bF
(20286-PC)
, Point Hope
, No description given in Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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echinoderm debris, indet.
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bryozoan fragments, indet.
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Echinoconchus aff. E. alternatus (Norwood & Pratten)
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pelecypod fragments, indet.
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nautiloid cephalopod (perhaps Cycloceras)
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61ATr143d-eF (talus)
(20287-PC)
, Point Hope
, No description given in Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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Leptagonia aff. L. analoga (Phillips)
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Echinoconchus aff. E. alternatus (Norwood & Pratten)
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Spirifer aff. S. arkansanus Girty
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61ATr143d-eF (in place)
(20288-PC)
, Point Hope
, No description given in Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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Spirifer aff. S. arkansanus Girty
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61ATr143e'-f
(20289-PC)
, Point Hope
, No description given in Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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Echinoconchus aff. E. alternatus (Norwood & Pratten)
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dictyoclostid (perhaps Inflatia)
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Spirifer aff. S. arkansanus Girty
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61ATr143g-hF
(20290-PC)
, Point Hope
, No description given in Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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Echinoconchus aff. E. alternatus (Norwood & Pratten)
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Spirifer aff. S. arkansanus Girty
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61ATr143j-kF
(20291-PC)
, Point Hope
, No description given in Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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61ATr143k-lF
(20292-PC)
, Point Hope
, No description given in Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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Rhipidomella aff. R. arkansana Girty
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Leiorhynchoidea? aff. L. polypleurum (Girty)
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loxonemid gastropod, indet.
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61ATr143l'-mF
(20293-PC)
, Point Hope
, No description given in Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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Leiorhynchoidea? aff. L. polypleurum (Girty)
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61ATr143o-pF
(20294-PC)
, Point Hope
, No description given in Dutro E&R report of 5/31/68 [Shipment A-63-3]); transmittal sheet of Tailleur, dated 1/22/1962 provides following: "From measured section exposed on cliffs at beach about 3/4-mile south of Cape Lewis. Lithologic and stratigraphic data shown on attached columns; photographic locations available. From 68 deg. 26'33", 166 deg. 11'40" to 68 deg. 26'45", 166 deg. 11'00" (12.4, 11.4)" [Note by R.B. Blodgett: the latitude given by Tailleur is incorrect!!!!, according to physical locality description which indicates a higher latitude position (in Point Hope C-2 quad.); need to correct from field sheets]
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