Tsagaan Del Unit 7. Right bank of Buriduin-Gol River, 4 km NE of Bor-kuduk well (Ordovician of Mongolia)

Also known as Tsagan-Del

Where: Bayanhongor, Mongolia (46.4° N, 100.3° E: paleocoordinates 27.3° N, 20.5° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Dicellograptus anceps graptolite zone, Upper Member (Tsagaan Del Formation), Katian (453.0 - 445.2 Ma)

• Bolshakova and Ulitina 1985 give unit 6 as 10 m thick.

•Orlovskii stage in Russia; Nariingol in Mongolia.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, fine-grained, quartzose sandstone and limestone

• Quartzose fine-grained sandstones, at the base with limestone lenses containing fossils

Size class: macrofossils

Collection methods: peel or thin section,

Primary reference: K.h. S. Rozman and C.h. Minzhin. 1980. Stratigraphy of the Ordovician Ashgillian Stage of Western Mongolia. International Geology Review 22(5):575-586 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 170535: authorized by Pete Wagner, entered by Pete Wagner on 23.06.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Stromatoporoidea
 Clathrodictyida - Clathrodictyidae
Clathrodictyon vormsiense Riabinin 1951 stromatoporoid sponge
Anthozoa
 Heliolitida - Halysitidae
Halysites pracecedens tabulate coral
 Heliolitida - Proporidae
Propora ex gr. magna tabulate coral
Propora speciosa tabulate coral
 Heliolitida - Proheliolitidae
 Favositida - Favositidae
"Palaeofavosites argutus" = Paleofavosites
"Palaeofavosites argutus" = Paleofavosites tabulate coral
Strophomenata
 Strophomenida - Strophomenidae
Strophomena "sp. nov." Rafinesque and De Blainville 1824
Rhynchonellata
 Orthida - Hesperorthidae
 Orthida - Dalmanellidae
 Atrypida - Atrypinidae
Spirigerina mongolensis
ex gr. praemarginalis
 Pentamerida - Parastrophinidae
"Parastrophinella salairica" = Protanastrophia salairica
"Parastrophinella salairica" = Protanastrophia salairica Severgina 1978
Conodonta
 Panderodontida - Panderodontidae
Panderodus gracilis Branson and Mehl 1933 conodont
 Belodellida - Belodellidae
? Belodella sp. Ethington 1959 conodont
 Prioniodontida -
Erismodus sp. conodont
 Prioniodontida - Balognathidae
 Prioniodontida - Oistodontidae
 Protopanderodontida - Drepanoistodontidae
Paltodus sp. Pander 1856 conodont
 Life -
"Khangalites heteromorphus" = Khangailites, "Khangalites sinkiangensis" = Khangailites
"Khangalites heteromorphus" = Khangailites
"Khangalites sinkiangensis" = Khangailites