Sierra Plomosa Reefs (Permian to of Mexico)

Also known as Reef 3540

Where: Chihuahua, Mexico (29.0° N, 105.3° W: paleocoordinates 1.6° S, 37.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Plomosas Formation, Sakmarian to Sakmarian (295.5 - 279.3 Ma)

• Late Wolfcampian-?Early Leonardian

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified reef rocks and lithified packstone

• 4 reef horizons (algal boundstones, packstones and grainstones) separated by siltstones, sandstones and shales

Size classes: macrofossils, mesofossils, microfossils

Collection methods: peel or thin section,

Primary reference: H. Montgomery. 2004. Deposition and emplacement of Permian reefs in Sierra Plomosa, Chihuahua, Mexico. Revista Mexicana de Ciencias Geologicas 21(2):236-246 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 75754: authorized by Wolfgang Kiessling, entered by Uta Merkel on 26.10.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Sphaerocodium
  -
Girvanella
  -
? Girvanella sp. Nicholson and Etheridge 1878
 Foraminiferida -
"Foraminiferida indet." = Foraminifera
"Foraminiferida indet." = Foraminifera d'Orbigny 1826 foram
Fusulinina
 Fusulinoidea - Schwagerinidae
Parafusulina sp. Dunbar and Skinner 1931
Schwagerina sp. Moeller 1877
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
Gastropoda
  -
Gastropoda indet. Cuvier 1797 snail
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Fenestrida - Acanthocladiidae
unclassified
  -
Porifera indet. Grant 1836
Demospongea
 Agelasida - Guadalupiidae
Guadalupia sp. Girty 1909 demosponge
Dasycladophyceae
 Dasycladales - Dasycladaceae
Rhodophyceae
  - Solenoporaceae
Nigriporellidae
  - Nigriporellidae