Gerkez Mountain, Bolshoi Balkhan (upper 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

• 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 187416: authorized by Matthew Clapham, entered by Matthew Clapham on 25.07.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Oppeliidae
 Ammonitida - Morphoceratidae
Morphoceras patescens Buckman 1922 ammonite
 Ammonitida - Perisphinctidae
Franchia aff. quenstedti Sibiryakova 1961 ammonite