Also known as University of California Locality 3731
Where: Colorado (38.9° N, 105.3° W: paleocoordinates 40.1° N, 97.8° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Florissant Formation, Late/Upper Eocene to Late/Upper Eocene (37.2 - 28.4 Ma)
• From MacGinitie: Fossils are found in unit 3, about 50 feet of lake shales and associated volcanic sediments. The best and most abundant plant and insect fossils are found in this member, in paper shales at or near its base.
• group of beds-level stratigraphic resolution
Environment/lithology: lacustrine; fine-grained, gypsiferous, tuffaceous shale and siltstone
Size class: macrofossils
Preservation: mold/impression, original carbon
Reposited in the UCMP
Collection methods: bulk,
• Out of the 588 specimens listed, 9 are described as 'uncertain affinity'. They are not reported in the occurrence list.
Primary reference: H. D. MacGinitie. 1953. Fossil Plants of the Florissant Beds of Colorado. Carnegie Inst. of Washington, Contributions to Paleontology Publ. 599:1-198 [C. Labandeira/C. Labandeira/M. Kosnik]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 39839: authorized by Peter Wilf, entered by Jocelyn Sessa on 08.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Hexactinellida | |
Robinia lesquereuxi glass sponge | |
Polypodiopsida | |
Dicotyledoneae | |
Eugenia arenaceaeformis myrtle | |
Angiospermae | |
Rhus stellariaefolia sumac
Rhus obscura sumac
Astronium truncatum cashew
Astronium calyx cashew
Cotinus fraterna Lesquereux 1883 cashew | |
| |
Athyana haydenii soapberry
Koelreuteria alleni golden rain tree
Acer florissanti Kirchner 1898 maple | |
Staphylea acuminata Lesquereux 1873 bladdernut | |
Carya libbeyi hickory | |
Fagopsis longifolia Lesquereux 1872
Quercus scottii oak
Quercus scudderi Knowlton 1916 oak
Castanea dolichophylla chestnut | |
Populus crassa Lesquereux 1883 poplar
Salix coloradica willow | |
| |
Zizyphus florissanti buckthorn | |
Cedrelospermum sp. Saporta 1889 elm
Ulmus tenuinervis Lesquereux 1873 elm | |
Crataegus copeana hawthorn | |
Cercis parvifolia Lesquereux 1883 redbud | |
Persea florissantia laurel | |
Typha lesquereuxi Cockerell 1908 bulrush | |
Mahonia marginata barberry | |
| |
Sequoia affinis Lesquereux 1876 coast redwood
Chamaecyparis linguaefolia cypress | |
Pinopsida | |
Pinus hambachi Kirchner 1898 pine
Pinus florissanti Lesquereux 1883 pine |