2180-II-D-18, Bir al Qasr Fmn., Ash Shati area, N. flank of Murzuk Basin (Devonian of Libya)

Where: Libya (27.5° N, 13.8° E: paleocoordinates 53.8° S, 43.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bi'r al Qasr Formation, Eifelian (393.3 - 387.7 Ma)

• Age range of formation is Eifelian to Givetian (ref. 8780). However, the bulk is Eifelian, and the Givetian age applies only to the uppermost beds.

• bed-level stratigraphic resolution

Environment/lithology: marine; sandstone and claystone

• "[formation yields] poorly diversified benthic asssemblages with mainly sessile elements...low diversity and degree of fragmentation indicate moderate current activity, in a shallow subtidal BA2 environment"
• Formation in general: "In the typical development, the Formation begins with med-gr. sst, continues w/ silty clayst. b eing interbedded w/ sst., and is finished with sst." [ref. 8780]

•This collection: "quartzose sandstone"

Primary reference: M. Mergl and D. Massa. 1992. Devonian and Lower Carboniferous brachiopods and bivalves from western Libya. Biostratigraphie du Paleozoique 12:1-115 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 36175: authorized by Michael Foote, entered by Michael Foote on 15.01.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Acastidae
? Kayserops (Comura) sp. Delo 1935 trilobite
Bivalvia
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
Stenolaemata
 Fenestrida - Fenestellidae
 Lophophorata -
Tentaculitida indet. Ljaschenko 1955
Strophomenata
 Orthotetida - Chilidiopsidae
Rhynchonellata
 Spiriferida - Spinocyrtiidae
Spinocyrtiidae indet. Ivanova 1959
 Spiriferida - Ambocoeliidae
 Rhynchonellida - Trigonirhynchiidae
 Orthida - Schizophoriidae
Schizophoria sp. King 1850