Bir Zaltan - Ar Rahlah Membr, Marada Formation (Miocene to of Libya)

Where: Libya (29.2° N, 19.2° E: paleocoordinates 28.2° N, 17.9° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Ar Rahlah Member (Marada Formation), Aquitanian to Aquitanian (23.0 - 16.0 Ma)

• The Marada Formation is divided into two members; a lower Qarat Jahannam Member and an upper Ar Rahlah Member. The Ar Rahlah Member consists of carbonates in the lower part which change facies both laterally and vertically into terrigenous clastics. The lower part (the carbonates facies) is made up of green and yellow calcaerous sandstones, dolomites, and coquinoid limestones. The upper part (the clastic facies) is composed of white and green, bioturbated, calcareous sandstones and minor conglomerates. Its thickness is approximately 47 m (154 ft). It is assigned a lower-middle Miocene (Aquitanian-Serravallian) age.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, dolomitic, green, yellow, conglomeratic sandstone and shelly/skeletal limestone

• No paleoenvironmental data provided.
• Comprises green and yellow calcaerous sandstones, dolomites, and coquinoid limestones, white and green, bioturbated, calcareous sandstones and minor conglomerates

Size classes: macrofossils, microfossils

Collection methods: No detailed collection data reported.

Primary reference: E. E. Tawadros. 2001. Geology of Egypt and Libya 1-468 [A. Miller/A. Hendy/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 42131: authorized by Austin Hendy, entered by Austin Hendy on 24.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Collection based on taxa listed in text as typical of formation. Includes molluscs and forams. Page 287
Foraminifera
 Globigerinoidea - Globigerinidae
Globigerina bulloides d'Orbigny 1826
Globigerinoides cf. quadrilobatus
Subspecies: Globigerinoides cf. quadrilobatus trillbus
Tubothalamea
 Miliolida - Alveolinidae
Anthozoa
 Scleractinia - Poritidae
Porites colligniana stony coral
Subspecies: Porites colligniana gerudiensis
Gastropoda
 Sorbeoconcha - Strombidae
"Strombus coronatus" = Persististrombus coronatus
"Strombus coronatus" = Persististrombus coronatus Defrance 1827 true conch
Bivalvia
 Pectinida - Pectinoidae
 Ostreida - Ostreidae
Lopha plicatula oyster
Subspecies: Lopha plicatula var. virleti
 Lucinida - Lucinidae
Codakia leonina clam
Subspecies: Codakia leonensis var. mediolaevis