Sample Detail of
Sample: Sample No. 50AHa31 -- USGS No. Mesozoic loc. 22420
Locality: Field No. 50AHa31
Description: Pt. A32 on first creek entering Chinitna Bay east of Park Creek. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Ammonites. Pt. A32 on first creek entering Chinitna Bay east of Park Creek. Chinitna or Tonnie siltstone?"][Shown as locality 219 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59o 48'58" N., 153o 03'30" W.]
Location: Alaska Quadrangle: Iliamna D-1
Lat.: 59o48'58 " Long.: 153o03'30 "
Reference
Title: Report on Referred Fossils ,  1951 (02/13)
Examination has been made of the collections obtained by J.K. Hartsock's party during the field season of 1950 on Iniskin Peninsula and the area between Chinitna Bay and Tuxedni Bay.
Report by: Ralph W. Imlay
Referred by: John K. Hartsock , Arthur Grantz
Age: No Data
Formation: Chilikadtrona Greenstone
Comment:Chinitna formation
Occurrence(s)
No. Group Name Qty Notes
1 Ammonoids Xenocephalites sp. juv.
2 Ammonoids Kheraiceras sp. juv.
3 Belemnites Belemnites
4 Bivalves Grammatodon sp.
5 Bivalves Astarte sp.
6 Bivalves Entolium sp.
7 Bivalves Oxytoma sp.

Title: Geology of the Iniskin-Tuxedni Region, Alaska [last half of single issue publication] ,  1966
Report by: Robert L. Detterman , John K. Hartsock
Age: Callovian (early Callovian)
Formation: Chinitna Formation - Tonnie Siltstone Member (Tonnie Siltstone Member)
Comment:Geographic location: Brown Creek-Park Creek
Map reference (pl. 3): 219
Stratigraphic position below top of formation (ft): 200-250
all above data from Table 10, p. 45
Occurrence(s)
No. Group Name Qty Notes
1 Bivalves Grammatodon sp.
2 Bivalves Oxytoma sp.
3 Bivalves Entolium sp.
4 Bivalves Astarte sp.
5 Ammonoids Kheraiceras sp.
6 Ammonoids Xenocephalites sp.