Tsagaan Del Unit 6. Right bank of Buriduin-Gol River, 4 km NE of Bor-kuduk well (Ordovician of Mongolia)

Also known as Reef 2668; 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 complanatus graptolite zone, Upper Member (Tsagaan Del Formation), Katian (453.0 - 445.2 Ma)

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

•Diyetken stage in Mongolia.

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified, shelly/skeletal, brown, gray, argillaceous, sandy limestone

• Bolshakova & Ulitina 1985: reef-like limestone lens intercalated in sandstones.

•Rozman & Minzhin 1980: Brownish-gray, argillaceous limestones, with seams of sandy, organogenic, coral-brachiopod, eluviated limestones.

Size class: macrofossils

Collection methods: peel or thin section,

Primary reference: L. N. Bolshakova and L. M. Ulitina. 1985. Stromatoporaty i biostratigrafiya nizhnego paleozoya Mongolii [Stromatoporata and biostratigraphy of the Lower Paleozoic of Mongolia]. Trudy Sovmestnaya Sovetsko-Mongolskaya Paleontologicheskaya Ekspeditisiya [Transactions of the Joint Soviet-Mongolian Paleontological Expedition] 27:5-94 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 79592: authorized by Wolfgang Kiessling, entered by Uta Merkel on 14.03.2008, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
Strophomenata
 Strophomenida - Sowerbyellidae
"Eoplectodonta ex gr. conspicua" = Eoplectodonta (Eoplectodonta) conspicua2
"Eoplectodonta ex gr. conspicua" = Eoplectodonta (Eoplectodonta) conspicua2 Reed 1917
 Strophomenida - Strophomenidae
Oepikina sp.2 Salmon 1942
Rhynchonellata
 Pentamerida - Parastrophinidae
"Parastrophinella salairica" = Protanastrophia salairica2
"Parastrophinella salairica" = Protanastrophia salairica2 Severgina 1978
top 5 meters only
 Rhynchonellida - Trigonirhynchiidae
Rostricellula "sp. nov."2 Ulrich and Cooper 1942
 Rhynchonellida -
 Orthida - Dalmanellidae
 Orthida - Hesperorthidae
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Trepostomida -
  - Phylloporinidae
 Cryptostomata - Rhinidictyidae
 Cryptostomata - Arthrostylidae
 Trepostomata - Monticuliporidae
 Trepostomata - Trematoporidae
Conodonta
 Conodontophorida -
Neocoleodus borealis2 conodont
top 5 meters only
 Panderodontida - Panderodontidae
Panderodus serratus1 Rexroad 1967 conodont
Panderodus gracilis2 Branson and Mehl 1933 conodont
 Prioniodontida -
Erismodus sp.2 conodont
 Prioniodontida - Balognathidae
  -
Scandodus "sp. I of Lindstrom"2 Lindstrom 1955 conodont
top 5 meters only
Stromatoporoidea
 Labechiida - Rosenellidae
Pachystylostroma ozakii1 Bolshakova and Ulitina 1985
 Labechiida - Stromatoceriidae
 Labechiida - Labechiidae
Labechia huronensis Billings 1865
 Clathrodictyida - Clathrodictyidae
Anthozoa
 Tabulata -
Tabulata indet. Milne-Edwards and Haime 1850 tabulate coral
Heliolitida indet. Frech 1897 tabulate coral
 Heliolitida - Halysitidae
Halysites proecedens2 tabulate coral
Catenipora "sp. nov."2 Lamarck 1816 tabulate coral
 Heliolitida - Proheliolitidae
 Heliolitida - Sibiriolitidae
 Heliolitida - Proporidae
Propora ex gr. magna2 tabulate coral
 Stauriida - Streptelasmatidae
Grewingkia anguinea Scheffen 1933 horn coral