R20 (Ordovician of the United States)

Where: Vermont (44.8° N, 73.4° W: paleocoordinates 28.6° S, 56.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Crown Point Formation (Chazy Group), Whiterockian (470.0 - 457.3 Ma)

Environment/lithology: marine; lithology not reported

• Probably carbonate.

Size classes: macrofossils, mesofossils

Reposited in the NYSM

Primary reference: F.C. Shaw. 1968. Early Middle Ordovician (Chazy) trilobites of New York. New York State Museum and Science Service Memoir 17:1-163 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 103292: authorized by Melanie Hopkins, entered by Melanie Hopkins on 25.01.2011, edited by Mihaela Krause

Creative Commons license: CC BY (attribution)

Taxonomic list

Stromatoporoidea
 Labechiida - Rosenellidae
Pseudostylodictyon sp.1 Ozaki 1938 stromatoporoid sponge
Trilobita
 Corynexochida - Illaenidae
Bumastus (Bumastoides) aplatus Raymond 1925 trilobite
 Phacopida - Cheiruridae
Sphaerexochus valcourensis2 Shaw and Bolton 2011 trilobite