Sample Detail of
Sample: Sample No. 50AHr364-A -- USGS No. Mesozoic loc. 23168
Locality: Field No. 50AHr364-A
Description: 27 3/4 miles S. 56 1/2o W. of outlet of Lake Kagati; 14 3/4 miles N. 25 1/2o W. of mouth of Klak Creek. 7/8 mile S. 30o W. of a high sharp peak in the bend of the east fork of Nukluk Creek. Fossils came from talus near the top and on the north slope of the ridge which extends southwest of the high peak mentioned above, at a point a few hundred feet southwest of a low saddle which separates the peak from the ridge. Lithology of beds (from transmittal sheet of Hoare): Fossils occur in float derived from a horizon not over 20 feet thick that occurs in a section perhaps 200 feet thick of cherty, argillaceous and tuffaceous rocks containing scattered limestone lenses. All the fossils were found in the cherty and argillaceous rocks. None were found in the limestone. These rocks are associated with at least 200 feet of thin-bedded (beds 1"-6" thick) green and gray chert and several hundred feet of greenstones. The exact relationship between the three rock types has not been determined.
Location: Alaska Quadrangle: Goodnews Bay C-5
Reference
Title: Report on Referred Fossils ,  1950 (12/19)
Three faunas are present in these collections. The youngest is marked by Aucella crassicollis Keyserling and is of Lower Cretaceous age. The next older is an Upper Triassic assemblage with Pseudomonotis subcircularis Gabb, of Noric age. The third is also Upper Triassic and is marked by Halobia, of Karnic age. One lot contains reworked Later Paleozoic bryozoans.
Report by: John B. Reeside , Jr.
Referred by: Joseph M. Hoare
Age: Norian
Comment:The next older [referring to the three faunas noted in this report - comment by R.B. Blodgett] is an Upper Triassic assemblage with Pseudomonotis subcircularis Gabb, of Noric age.
Occurrence(s)
No. Group Name Qty Notes
1 Bivalves Pseudomonotis subcircularis Gabb