Damon Mound (Oligocene of the United States)

Also known as Reef 643

Where: Brazoria County, Texas (29.3° N, 95.7° W: paleocoordinates 29.9° N, 90.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Anahuac Formation, Chattian (28.1 - 23.0 Ma)

• Heterostegina zone

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified limestone and lithified lime mudstone

• 10 m thick reef core, 10 m thick calcilutite Porites thicket, and reef drape and back-reef sandstones

Size class: macrofossils

Primary reference: L. G. Zachos and A. Molineux. 2007. Echinoid fauna from a Late Oligocene (Chattian) reef at Damon Mound, Brazoria County, Texas. Palaeogeography, Palaeoclimatology, Palaeoecology 243:79-91 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 69932: authorized by Wolfgang Kiessling, entered by Uta Merkel on 13.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Pectinoidae
Chlamys sp. Röding 1798 scallop
 Pholadida - Teredinidae
Kuphus sp. Guettard 1770 clam
Echinoidea
 Cidaroida - Cidaridae
 Echinoida -
"Echinometra prisca" = Ellipsechinus prisca
"Echinometra prisca" = Ellipsechinus prisca Cotteau 1875 sea urchin
 Spatangoida - Schizasteridae
"Agassizia mossomi" = Agassizia (Anisaster) mossomi
"Agassizia mossomi" = Agassizia (Anisaster) mossomi Cooke 1942 heart urchin
 Spatangoida - Loveniidae
Lovenia alabamensis Cooke 1959 heart urchin
 Spatangoida - Brissidae
Brissus exiguus heart urchin
 Clypeasteroida - Clypeasteridae
"Clypeaster marinanus" = Clypeaster rogersi, Clypeaster cf. oxybaphon
"Clypeaster marinanus" = Clypeaster rogersi Morton 1834 sand dollar
Clypeaster cf. oxybaphon Jackson 1922 sand dollar
Anthozoa
 Scleractinia - Poritidae
Porites douvillei Vaughan 1919 stony coral
 Scleractinia - Montastraeidae
Montastrea intermedia Duncan 1863 stony coral
 Scleractinia - Faviidae
Antiguastrea cellulosa Duncan 1863 stony coral