Elgin Standard (Eocene of the United States)

Also known as Butler

Where: Bastrop County, Texas (30.3° N, 97.3° W: paleocoordinates 33.7° N, 83.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Butler Clay Member (Rockdale Formation), Early/Lower Eocene (55.8 - 48.6 Ma)

• thought to be "lower Eocene" but possibly late Paleocene because the member straddles the epoch boundary

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithified sandstone and lithified claystone

• "paratropical rain forest"
• "15 feet of alternating layers of fossiliferous sand and clay underlain by at least 16 feet of non-leaf-bearing, black, silty clay"

Size class: macrofossils

• "Leaves, twigs and stems are very common at the locality; fruits are rarely found"

Preservation: adpression

Collection methods: quarrying,

Primary reference: R. S. Irving and T. F. Stuessy. 1971. A new paratropical angiosperm florule in the Eocene Rockdale Formation of Bastrop County, Texas. Southwestern Naturalist 16(1):111-116 [J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 98211: authorized by John Alroy, entered by John Alroy on 23.09.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Angiospermae
 Magnoliales - Magnoliaceae
Magnolia sp. Linnaeus 1753 magnolia
Magnolia leei Knowlton 1916 magnolia
 Magnoliales - Annonaceae
Annona ampla custard apple
 Vitales - Vitaceae
 Celastrales - Celastraceae
 Fagales - Nothofagaceae
 Fagales - Juglandaceae
 Fabales - Fabaceae
Inga laurinafolia Berry 1916 legume
 Rosales - Papilionaceae
Sophora wilcoxiana Berry 1916
 Sapindales - Sapindaceae
Sapindus linearifolius Berry 1916 soapnut
 Rosids - Moraceae
Artocarpus lessigiana Knowlton mulberry
abundance omitted
Dicotyledoneae
 Myrtales - Combretaceae
 Primulales - Myrsinaceae
 Parietales - Ternstroemiaceae
Angiospermae
  -
Carpolithus sp. Linnaeus 1768
"form genus"
 Laurales - Lauraceae
Nectandra lancifolia Lesquereux 1869 laurel
Oreodaphne obtusifolia Berry 1916 laurel
Oreodaphne pseudoguianensis Berry 1916 laurel
 Gentianales - Apocynaceae
 Dilleniales - Dilleniaceae
Dillenites sp. Berry 1916
Dillenites texensis Berry 1916