Sample Detail of
Sample: Sample No. 73Ast109
Locality: Field No. 73Ast109
Description: These fossils were colleccted from carbonate bodies in Amphitheater Group lavas. To date, the only age control we have for this extrusive unit are in the very uppermost part near Clearwater Gulch to the east. There, Halobia and Monotis document an Upper Triassic age. These collections are from the lowermost part of the flow sequence (107, 109) and the middle (63). I hope they may establish the onset of Triassic volcanism. No detailed locality description given in E&R report, but accompanying transmittal sheet includes map which indicates locality is in the SE 1/4 Sec. 13, T32N, R9E of the Talkeetna Mtns. D-2 quadrangle.
Location: Alaska Quadrangle: Talkeetna Mts D-2
Township&Range: T32N R9E Section: 13
Reference
Title: Report on Referred Fossils ,  1975 (05/19)
Report by: K. M. Nichols , Norman J. Silberling
Referred by: T. E. Smith
Age: No Data
Formation: Amphitheater Group
Comment:Like 73Ast107 most of the skeletal bebris is crinoidal and useless for dating. Other large skeletal fragments include coral, bryozoa and spongiomorphs (?), none of which has preserved herein are age diagnostic in the Upper Triassic. Collection discarded except for a few specimens for thin-sectioning.
Occurrence(s)
No. Group Name Qty Notes
1 Crinoids Crinoid bebris
2 Corals Coral
3 Bryozoans Bryozoa