Where: Santa Cruz County, California (37.2° N, 122.1° W: paleocoordinates 36.8° N, 110.1° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Butano Formation, Bartonian (41.3 - 38.0 Ma)
• Stratigraphically 115 feet below top of Butano formation, at stream level, in 1-inch black siltstone stringer at top of a 2-foot bed of alternating coarse and fine-grained siltstone.
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified siltstone
Size class: macrofossils
Reposited in the UCMP
Primary reference: F. R. Sullivan. 1962. Foraminifera from the type section of the San Lorenzo Formation, Santa Cruz County, California. University of California Publications in Geological Sciences 37(4):233-352 [M. Clapham/M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 186057: authorized by Matthew Clapham, entered by Matthew Clapham on 07.06.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
| Foraminifera | |
Globigerina decepta, "Globigerina triloculinoides" = Subbotina triloculinoides
Globigerina decepta Martin 1943
"Globigerina triloculinoides" = Subbotina triloculinoides Plummer 1926 | |
|
Plectina garzaensis Cushman and Siegfus 1935 | |
|
Amphimorphina ignota Cushman and Siefgus 1939 | |
|
Cancris mexicanus Cushman and Todd 1942 | |
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| |
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Cassidulina cf. diversa Cushman and Stone 1949 | |
|
Chilostomella hadleyi Keijzer 1945
Sphaeroidina gredalensis Cook 1959 | |
| Globothalamea | |
|
Valvulineria cf. wilcoxensis Cushman and Ponton 1932
Valvulineria tumeyensis Cushman and Simonson 1944 | |
|
Nodogenerina sanctaecrucis Kleinpell 1938 | |
| Tubothalamea | |
|
Spiroloculina lamposa Hussey 1949 | |