USGS M1812, Maple Island [Lower Sandstone Mbr, Haida Fm] (Cretaceous of Canada)

Also known as M1813, M1835, M1837. M1838

Where: British Columbia, Canada (53.3° N, 132.0° W: paleocoordinates 22.9° N, 110.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Haida Formation, Albian (113.0 - 100.5 Ma)

• STRATIGRAPHIC RELATIONS: From the lower sandstone member of the Haida Fm, which rests unconformably on massive agglomerate of the Jurassic Yakoun Fm, and is overlain by the shale member, which passes up into the Honna Fm. AGE: Albian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From 1010-1070 m above base of local section, at top of sandstone member.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, concretionary, gray sandstone

• ENVIRONMENT: not stated in text, but apparently shallow marine siliciclastic.
• SPECIFIC LITHOLOGY: Massive to flaggy, grey, feldspathic sandstone with concretions. LITHIFICATION: Lithified, on the basis of facies description and figured specimens.

Size class: macrofossils

Preservation: mold/impression

Collected by Jones in 1963; reposited in the USNM

• COLLECTOR: D.L. Jones. REPOSITORY: USGS, presumably now at USNM.

Primary reference: F. H. McLearn. 1972. Ammonoids of the lower Cretaceous sandstone member of the Haida Formation, Skidgate Inlet, Queen Charlotte Islands, western British Columbia. Geological Bulletin of Canada Bulletin 188:1-78 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87490: authorized by Austin Hendy, entered by Austin Hendy on 18.03.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonoids, but other groups not listed. NOMENCLATURE: Authoritative publication with slightly antiquated nomenclature, but with species resolution identifications.
Cephalopoda
 Ammonitida - Ptychoceratidae
Ptychoceras (Diptychoceras) glaber Whiteaves 1884 ammonite
 Ammonitida - Turrilitidae
Pseudhelicoceras sp. Spath 1922 ammonite
 Ammonitida - Kossmaticeratidae
Marshallites cumshewaensis Whiteaves 1884 ammonite
 Ammonitida - Desmoceratidae
Desmoceras (Pseudoughligella) dawsoni Whiteaves 1900 ammonite
Puzosia skidegatensis McLearn 1972 ammonite
 Ammonitida - Tetragonitidae
Tetragonites subtimotheanus Wiedmann 1962 ammonite
Zelandites sp. Marshall 1926 ammonite
 Ammonitida - Brancoceratidae
Mortoniceras (Deiradoceras) "sp. B" Van Hoepen 1931 ammonite