Sample Detail of
Sample: Sample No. 92AD22A -- USGS No. 32428-PC
Locality: Field No. 92AD22A
Description: Howard Pass C-3. Lat. 68o 38'20" N., Long. 157o 32'30" W. Fine-grained limestone with abundant small burrows. Thin section is calcareous peloid spiculite that contains calcispheres and brown mud clasts. Sample collected from very fine grained rock (periplatform ooze?) and may contain relatively indigenous faunas. Probably stratigraphically below samples at locality 27. If fauna is not reworked, this sample and that from locality 52 are the oldest from unit Mlri. (description from Dover et al., 2004, p. 32 (Table 1)); [Fine-grained limestone with abundant small burrows. Sample collected from very fine grained lithology (periplatform ooze?) and may contain more indigenous faunas. (description from Harris E&R report dated March 17, 1995; Shipment no. A-95-3)]; [Howard Pass C-3. 68°38'20", 157°32'30". Fine-grained limestone with abundant small burrows. Sample collected from very fine grained lithology (periplatform ooze?) and may contain more indigenous faunas. (description from Harris E&R report dated Jan. 25, 1995; Shipment no. A-95-3a)]

NOTE BY R.B. BLODGETT, NOTE MAJOR AGE DIFFERENCE BETWEEN THE TWO E&R REPORTS
Location: Alaska Quadrangle: Howard Pass C-3
Township&Range: 9 S. 24 W. Section: 28
Lat.: 68o38'20 " Long.: 157o32'30 "
Reference
Title: Geologic and fossil locality maps of the west-central part of the Howard Pass Quadangle and part of the adjacent Misheguk Mountains Quadrangle, western Brooks Range, Alaska ,  2004
Report by: Jim Dover , Irv L. Tailleur , Julie A. Dumoulin
Age: Kinderhookian
Formation: Lisburne Group (Rim Butte unit of Lisburne Group of Dumoulin and others (1993) (Mississippian))
CAI:Min: 1 - Max: 1.5
Comment:Age: early Ealy Mississippian (Kinderhookian)

Biofacies: Indeterminate (too few conodonts); normal-marine depositional environment.

Shown as locality 24 on Sheet 2; map unit: Mlri

CAI=1-1.5

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 1 Pa element Bispathodus stabilis (Branson and Mehl) .... All conodonts identified by A.G. Harris
2 Conodonts .... or B. utahensis Sandberg and Gutschick
3 Conodonts 1 Pa element Polygnathus purus Voges
4 Conodonts Unassigned elements: 1 M and 1 Sa
5 Conodonts 9 indet. bar, blade, and platform elements

Title: Report on Referred Fossils ,  1995 (03/17)
Analysis of all samples is given in the accompanying 16-page table. The range of biostratigraphically important samples is shown on the accompanying diagram. The heavy-mineral concentrates were analyzed by Nancy Stamm; the residues have been returned to Julie Dumoulin. Please note a few (~4 samples have heavy-mineral concentrates that include chalcopyrite and bornite).
Report by: Anita G. Harris
Referred by: Julie A. Dumoulin , J. H. Dover
Age: Kinderhookian
Formation: Lisburne Group ("Ipnavik facies" of Lisburne Group)
Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 1 Pa element Bispathodus stabilis (Branson and Mehl) or ......
2 Conodonts ....... Bispathodus utahensis Sandberg and Gutschick
3 Conodonts 1 Pa element Polygnathus purus Voges
4 Conodonts UNASSIGNED ELEMENTS:
5 Conodonts 1 Ma and 1 Sa
6 Conodonts 9 indet. bar, blade, and platform fragments

Title: Report on Referred Fossils ,  1995 (01/25)
All conodont analyses and samples and residue weights are given in the attached tables. The age range of all samples is graphically shown on the accompanying diagram.

Please give a copy of this report to Jim Dover and anyone else on the Howard Pass project that needs these data. I will do all the Carboniferous samples while in Florida.
Report by: Anita G. Harris
Referred by: Julie A. Dumoulin
Age: Middle Ordovician-Middle Devonian
Formation: Unnamed
CAI:Min: 5
Comment:Age: Middle Ordovician to Middle Devonian
CAI = 5

Heavy-mineral concentrate: chiefly iron oxides, lesser clusters of cryptocrystalline dolomite(?), and phosphatized(?) composite grains.
Wgt. (kg) 6.8; >20 Mesh insol. res., (grams) 720; 20-200 mesh insol. res., (grams) 121.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts Conodonts are deformed and fractured
2 Conodonts 2 Panderodus sp. indet. elements