GSC C-205920. 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 192180: 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
  -
Echinodermata "fragments"
Conodonta
 Prioniodontida -
Phragmodus cf. inflexus
 Belodellida - Belodellidae
Walliserodus sp.
Walliserodus sp. Serpagli 1967 conodont
 Panderodontida - Panderodontidae
Panderodus gracilis, ? Belodina sp.
Panderodus gracilis Branson and Mehl 1933 conodont
? Belodina sp. Ethington 1959 conodont
 Protopanderodontida - Drepanoistodontidae
Drepanoistodus suberectus
Drepanoistodus suberectus Branson and Mehl 1933 conodont
 Protopanderodontida - Protopanderodontidae
Protopanderodus sp.
Protopanderodus sp. Lindström 1971 conodont
Inarticulata
  -
Inarticulata indet.2
Strophomenata
 Strophomenida - Christianiidae
Christiania subquadrata2
Rhynchonellata
 Orthida - Paurorthidae
Paurorthis ponderosa2
 Orthida - Glyptorthidae
Glyptorthis assimilis2
Glyptorthis assimilis2 Cooper 1956
Stenolaemata
 Trepostomida - Monticuliporidae
Monticulipora grandis1
Monticulipora grandis1 Ulrich 1886
Gastropoda
  -
Gastropoda indet.3
Gastropoda indet.3 Cuvier 1795 snail
Anthozoa
 Stauriida - Paliphyllidae
Paliphyllum norfordi1
 Hyolithelminthida -
Phosphannulus universalis
1Bolton 1996; 2Jin and Norford 1996; 3Rohr 1996