Sample Detail of
Sample: Sample No. 48AI44 -- USGS No. Mesozoic loc. 21328
Locality: Field No. 48AI44
Description: [Shown as locality 212 on Pl. 3 of Detterman and Hartsock, 1966][Entry in USGS Mesozoic Fossil Locality register (Washington, D.C.) provides following description: "Orig. no. 48AI44. Upper Jurassic - Tuxedni Fm - Tonnie Mbr. Same geographical location as no. 21292. Northeast side of Tonnie Creek valley, near head, 2500 ft. S 43o E of Tonnie Peak; measure section. From interbedded sandstone-siltstone, 90 to 100 ft. above the base of the Tonnie member. July 20, 1948."]; [R. W. Imlay and D. J. Miller, 1948. Iniskin Peninsula, near head of Tonnie Creek, 2,500 ft S. 43° E. of Tonnie Peak, from 90 to 100 ft above base of the Chinitna formation. (description from Imlay, 1953, p. 67)]
Location: Alaska Quadrangle: Iliamna D-1
Reference
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: Tonnie Creek
Map reference (pl. 3): 212
Stratigraphic position below top of formation (ft): 90-100
all above data from Table 10, p. 45
Occurrence(s)
No. Group Name Qty Notes
1 Ammonoids Cadoceras (Paracadoceras) tonniensis Imlay

Title: Callovan (Jurassic) ammonites from the United States and Alaska. Part 2. Alaska Peninsula and Cook Inlet Regions. USGS Proferssional Paper 249-B ,  1953
Report by: Ralph W. Imlay
Age: Callovian
Formation: Chinitna Formation
Comment:Shown as locality 46 on Figure 7.
Occurrence(s)
No. Group Name Qty Notes
1 Ammonoids Cadoceras (Paracadoceras) tonniensis Imlay, n. sp.