Sample Detail of
Sample: Sample No. 50AHa21 -- USGS No. Mesozoic loc. 22418
Locality: Field No. 50AHa21
Description: About 50 feet above base of Naknek formation on west side of Oil Bay. Coll. by Hartsock 6/26/50. (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: "Cardioceras(?). Pt. K33 (Kirschner's point) on west side Oil Bay. About 50' above base of Naknek. 6/26/50. Banded sandstone."][Shown as locality 303 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59o 39'14" N., 153o 18'24" W.]; R. D. Hoare and J. K. Hartsock, 1950. West shore of Oil Bay, NE cor. SE1/4SE1/4 sec. 14, T. 6 S.. R. 24 W., Iliamna (C-1) Quadrangle, west of Cook Inlet, southern Alaska. Naknek Formation, about 15 m above base of unnamed lower sandstone member. Early Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 26); [Entry in USGS Mesozoic Catalogue (Washington, D.C.): 50AHa21 Upper Jurassic. Naknek fm. + or - 50 feet base of Naknek fm. on west side of Oil Bay at Pt.K.33. Coll. by Hartsock and Grantz, June 22, 1950.]
Location: Alaska Quadrangle: Iliamna C-1
Lat.: 59o39'14 " Long.: 153o18'24 "
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: Naknek Formation
Comment:Naknek formation
Occurrence(s)
No. Group Name Qty Notes
1 Ammonoids Cardioceras (Scarburgiceras) martini Reeside
2 Ammonoids Lytoceras sp.
3 Bivalves Pleuromya sp.
4 Bivalves Isocyprina? 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: Late Jurassic
Formation: Naknek Formation - lower sandstone member (lower sandstone member)
Comment:Geographic location: Oil Bay
Map reference (pl. 3): 303
Stratigraphic position below top of formation (ft): 50
all above data from Table 12, p. 51
Occurrence(s)
No. Group Name Qty Notes
1 Bivalves Pleuromya sp.
2 Bivalves Isocyprina sp.
3 Ammonoids Lytoceras sp.
4 Ammonoids Cardioceras (Scarburgiceras) martini Reeside

Title: Late Jurassic Ammonites from Alaska ,  1981
Report by: Ralph W. Imlay
Age: Oxfordian (early Oxfordian)
Formation: Naknek Formation (unnamed lower sandstone member of Naknek Formation)
Comment:Shown as loc. 9 on Fig. 1; also shown on Fig. 6 and Tables 3 and 5
Occurrence(s)
No. Group Name Qty Notes
1 Ammonoids Lytoceras sp.
2 Ammonoids Cardioceras (Scarburgiceras) martini Reeside