Picnic Grounds Section 12.2 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 (449.5 - 443.7 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 184417: authorized by Pete Wagner, entered by Pete Wagner on 24.02.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Diplograptoidea - Diplograptidae
Orthograptus fastigatus Davies 1929 diplograptoid
Orthograptus quadrimucronatus Hall 1865 diplograptoid
Orthograptus thorsteinssoni Melchin 1987 diplograptoid
Rectograptus amplexicaulis Hall 1847 diplograptoid
"Orthoretiograptus sp." = Parareteograptus Mu 1974 diplograptoid
 Bireclinata -
"Climacograptus tubuliferus" = Styracograptus tubuliferus
"Climacograptus tubuliferus" = Styracograptus tubuliferus Lapworth 1876 climacograptid