Snowblind Creek, Cornwallis Island, sponge biostromes (Silurian of Canada)

Also known as Reef 3711

Where: Nunavut, Canada (75.1° N, 93.9° W: paleocoordinates 0.7° N, 30.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Cape Phillips Formation, Ludlow (427.4 - 423.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: slope or ramp reef; lithified limestone and lithified marl

• densely packed sponge biostromes in a platform foreslope sequence, maximum lateral extent up to 40 m, several centimetres to decimetres thick

Size class: macrofossils

Primary reference: T. A. de Freitas. 1991. Ludlow (Silurian) lithistid and hexactinellid sponges, Cape Phillips Formation, Canadian Arctic. Canadian Journal of Earth Sciences 28:2042-2061 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 79385: authorized by Wolfgang Kiessling, entered by Uta Merkel on 06.03.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Hexactinellida
 Lyssacinosa - Malumispongiidae
? Malumispongium cornwallisi n. sp. de Freitas 1991 glass sponge
Demospongiae
 Lithistida -
 Lithistida - Anthaspidellidae
? Climacospongia sp. Hinde 1884 demosponge
Climacospongia snowblindella n. sp. de Freitas 1991 demosponge
Climacospongia undulata n. sp. de Freitas 1991 demosponge
Rhodesispongia simplex n. gen. n. sp. de Freitas 1991 demosponge
Archaeoscyphia sp. Hinde 1889 demosponge
 Lithistida - Astylospongiidae
Caryospongia tuberosa n. sp. de Freitas 1991 demosponge
 Streptosclerophorida - Hindiidae
Hindia sphaeroidalis Duncan 1879 demosponge
Anthozoa
 Tabulata -
Tabulata indet. Milne-Edwards and Haime 1850 tabulate coral
 Heliolitida - Heliolitidae
Heliolitidae indet. Lindström 1876 tabulate coral
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Brachiopoda
  -
Brachiopoda indet. Cuvier 1805