Gerkez Mountain, Bolshoi Balkhan (top Meulam Fm) (Jurassic of Turkmenistan)

Where: Turkmenistan (39.9° N, 54.3° E: paleocoordinates 36.4° N, 60.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Zigzag ammonoid zone, Meulam Formation, Early/Lower Bathonian (167.7 - 164.7 Ma)

• Upper Meulam subformation. Yeovilensis subzone.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

Size class: macrofossils

Collection methods: Repository: Vserossiyskiy Nauchno-Issledovatel'skiy Geologicheskiy Neftyanoy Institut (VNIGRI)

Primary reference: N. V. Besnosov and V. V. Mitta. 1993. Pozdnebayosskie i Batskie Ammonitidy Severnogo Kavkaza i Sredney Azii 1-347 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 189065: authorized by Matthew Clapham, entered by Matthew Clapham on 02.10.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Morphoceratidae
Ebrayiceras cf. rursum Buckman 1927 ammonite
Morphoceras sp. ammonite
Morphoceras subpatescens n. sp. Besnosov 1993 ammonite