PBDB Collection

GSC C-205923. Advance Mountain (Ordovician of Canada)

Where: British Columbia, Canada (56.0° N, 123.3° W: paleocoordinates 4.0° N, 63.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Belodina compressa conodont zone, Lower Member (Advance Formation), Turinian (457.3 - 453.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: slope; lithified, dolomitic, argillaceous limestone and lithified, calcareous shale

• environmental interpretation from paper, but this is almost certainly incorrect and no evidence is presented to suggest a slope setting

• Argillaceous, aphanitic to very fine grained, dark grey, weathering light grey and dull grey, platy, recessive; bedding 2-20 cm, wavy, some beds nodular. Limy shale interbeds 10-150Jo of rocks, olive-grey, weathering dull oli ve-grey; bedding 0.5-3 cm. Rare greyish black chert nodules (with off-white coronae) in upper 5 m.

Size class: macrofossils

Preservation: replaced with silica

Primary reference: B. S. Norford. 1996. Stratigraphy and biostratigraphy of the Advance Formation, a new upper Middle Ordovician unit, northern Rocky Mountains, British Columbia. Geological Survey of Canada Bulletin 491:5-19 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 192179: authorized by Pete Wagner, entered by Pete Wagner on 14.03.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	Pachydictidae indet., Ptilodictidae indet., Prioniodiniformes "element indet." Pachydictidae indet. Ptilodictidae indet. Prioniodiniformes "element indet."

Hyolithelminthida -	Phosphannulus universalis Phosphannulus universalis
Conodonta
Protopanderodontida - Drepanoistodontidae	Paroistodus sp. Paroistodus sp. Lindström 1971 conodont
Prioniodontida -	? Phragmodus sp. ? Phragmodus sp. Branson and Mehl 1933 conodont
Gastropoda
Euomphalina - Helicotomidae	Ophiletina angularis² Ophiletina angularis² Ulrich and Scofield 1897 snail
Murchisoniina - Lophospiridae	Lophospira "spp. 1"², Lophospira "spp. 2"² Lophospira "spp. 1"² Whitfield 1886 snail Lophospira "spp. 2"² Whitfield 1886 snail
Murchisoniina - Eotomariidae	Liospira cf. vitruvia² Liospira cf. vitruvia² Billings 1865 snail
Murchisoniina - Murchisoniidae	Murchisonia sp.² Murchisonia sp.² d'Archiac and de Verneuil 1841 snail
Bivalvia
Nuculida -	Nuculoidea "indet."¹ Nuculoidea "indet."¹ Gray 1824 clam
Unioni - Lyrodesmatidae	Lyrodesma sp.¹ Lyrodesma sp.¹ Conrad 1841 clam
Rhynchonellata
Rhynchonellida - Rhynchotrematidae	Hiscobeccus mackenziensis¹ Hiscobeccus mackenziensis¹
Orthida - Glyptorthidae	Glyptorthis assimilis¹ Glyptorthis assimilis¹ Cooper 1956
Orthida - Platystrophiidae	Platystrophia colbiensis¹ Platystrophia colbiensis¹ Foerste 1910
Orthida - Paurorthidae	Paurorthis ponderosa¹ Paurorthis ponderosa¹
Orthida - Dalmanellidae	Paucicrura rogata¹ Paucicrura rogata¹ Sardeson 1892 [Paucicrura rogara]
Strophomenata
Strophomenida - Rafinesquinidae	Rafinesquina praecursor¹ Rafinesquina praecursor¹
Strophomenida - Leptestiidae	Leangella biseptata¹ Leangella biseptata¹ [Leangella biseptala]
Strophomenida - Sowerbyellidae	Eoplectodonta (Eoplectodonta) alternata¹ Eoplectodonta (Eoplectodonta) alternata¹ Butts 1942
Stenolaemata
Trepostomata - Halloporidae	Calloporella sp., ? Parvohallopora sp., Tarphophragma sp. Calloporella sp. Ulrich 1882 ? Parvohallopora sp. Singh 1979 Tarphophragma sp.
Trilobita
-	Trilobita "indet." Trilobita "indet." Walch 1771 trilobite
Anthozoa
Stauriida - Streptelasmatidae	Grewingkia burdenensis Grewingkia burdenensis horn coral

¹Jin and Norford 1996; ²Rohr 1996