Where: Siskiyou County, California (41.9° N, 122.6° W: paleocoordinates 48.7° N, 88.0° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Asuncion Group, Coniacian (89.8 - 86.3 Ma)
• Assemblage was found near the base of the Senonian and about 350 ft above the upper Turonian. Coniacian in age.
• bed-level stratigraphic resolution
Environment/lithology: marine
Size class: macrofossils
Collection methods: quarrying,
• Collected and identified by Anderson (1895). Published in 1958, so Anderson's taxonomy is probably reasonably reliable.
Primary reference: F. M. Anderson. 1958. Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378 [A. Miller/A. Hendy/M. Clapham]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 44270: authorized by Austin Hendy, entered by Austin Hendy on 07.09.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
"Lytoceras (Tetragonites) henleyense" = Tetragonites popetensis
"Lytoceras (Tetragonites) henleyense" = Tetragonites popetensis Yabe 1903 ammonite | |
"Kotoceras aff. richardsoni" = Damesites sugata
"Kotoceras aff. richardsoni" = Damesites sugata Forbes 1846 ammonite | |
Parapachydiscus henleyensis Anderson 1902 ammonite | |
Metaplacenticeras pacificum Smith 1900 ammonite
Metaplacenticeras californicum Anderson 1902 ammonite | |
| |
Bivalvia | |
Inoceramus aff. pembertoni Waring 1917 clam |