Picnic Grounds Section 14.4 meters above base (Ordovician of the United States)

Where: Brewster County, Texas (30.2° N, 103.3° W: paleocoordinates 20.6° S, 76.8° W)

When: Dicellograptus ornatus graptolite zone, Maravillas Formation, Richmondian (449.6 - 445.5 Ma)

• Overlies Woods Hollow Shale. Amorphognafhus ordovicicus conodont zone.

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

• Not described, but shown as "~" in block.

Size class: macrofossils

Preservation: cast

Primary reference: D. M. Goldman, S. M. Bergström, and C. E. Mitchell. 1995. Revision of the Zone 13 graptolite biostratigraphy in the Marathon, Texas, standard succession and its bearing on Upper Ordovician graptolite biogeography. Lethaia 28:115-128 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 184418: authorized by Pete Wagner, entered by Pete Wagner on 24.02.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Diplograptidae
Rectograptus amplexicaulis, "Orthoretiograptus sp." = Parareteograptus, Orthograptus quadrimucronatus, Orthograptus fastigatus
Rectograptus amplexicaulis Hall 1847 graptolite
"Orthoretiograptus sp." = Parareteograptus Mu 1974 graptolite
Orthograptus quadrimucronatus Hall 1865 graptolite
Orthograptus fastigatus Davies 1929 graptolite
 Graptoloidea - Climacograptidae
"Climacograptus tubuliferus" = Styracograptus tubuliferus
"Climacograptus tubuliferus" = Styracograptus tubuliferus Lapworth 1876 climacograptid
 Graptoloidea - Dicranograptidae
Dicellograptus ornatus
Dicellograptus ornatus Elles and Wood 1904 graptolite