Alaska Paleontological Database

Sample Detail

Sample:	Sample No. 74AWr99A, B
Locality:	Field No. 74AWr99A, B
Description:	D5380A, B (74AWr99A, B). Jarvis Creek coal mine. A-from 3 feet above the main coal seam; B-just below top thin (of 3) coal bed and about 2 feet below base of thickest sandstone exposed at the top of cut. Latitude 63 degs. 34 min. 40 sec. N; Longitude 145 degs. 42 min. 31 min sec. W.
Location:	Alaska Quadrangle: Mt Hayes Lat.: 63^o34^'40 ^" Long.: 145^o42^'31 ^"

Reference

Title:	Report on Referred Fossils , 1976 (12/14)

Report by:	Jack A. Wolfe
Referred by:	Florence R. Weber


Age:	Early Miocene






Comment:	The large number of broadleaved tree genera represented indicates that these samples are certainly of pre-Homerian age. Samples from the lower part of the Healy Creek Formation contain characteristic forms such as Engelhardia and Aquilapollenites, and such forms are lacking in these two samples. I think that a Seldovian age is most probable for these samples. I cannot, however, determine certainly whether the upper or lower part of the Seldovian (that is, the upper part of the Healy Creek Formation versus the Sanctuary-Suntrana equivalent) is represented. In the Nenana coal field, the Sanctuary-Suntrana interval contains Tilia (lacking in the upper part of the Healy Creek) and typically Liquidambar (rare in the upper part of the Healy Creek). On this basis, I suggest that your Jarvis Creek samples are correlative with the upper part of the Healy Creek Formation and are of early Seldovian (early Miocene) age.