GSC C-184903, Hamley Point, Sidney Island (Cretaceous of Canada)

Where: British Columbia, Canada (48.6° N, 123.3° W: paleocoordinates 51.6° N, 83.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Tragodesmoceras ashlandicum ammonoid zone, Sidney Island Formation, Early/Lower Turonian (93.5 - 89.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, concretionary, silty sandstone

• Silty sandstone; beds to 1 m thick; massive to planar laminated to planar cross-stratified to

•hummocky cross-stratified; fine to medium grained, locally concretionary

Size class: macrofossils

Preservation: mold/impression

Collected by J.W. Haggart in 1990; reposited in the GSC

Primary reference: J. W. Haggart, P. D. Ward, and W. Orr. 2005. Turonian (Upper Cretaceous) lithostratigraphy and biochronology, southern Gulf Islands, British Columbia, and northern San Juan Islands, Washington State. Canadian Journal of Earth Sciences 42:2001-2020 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 210515: authorized by Matthew Clapham, entered by Matthew Clapham on 02.06.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Sorbeoconcha - Aporrhaidae
Anchura sp. Conrad 1860 snail
 Sorbeoconcha - Naticidae
? Gyrodes sp. Conrad 1860 moon snail
Cephalopoda
 Ammonitida - Desmoceratidae
"Pachydesmoceras pachydiscoides" = Pachydesmoceras pachydiscoide
"Pachydesmoceras pachydiscoides" = Pachydesmoceras pachydiscoide Matsumoto 1954 ammonite
 Ammonitida - Muniericeratidae
Tragodesmoceras ashlandicum Anderson 1902 ammonite
 Ammonitida - Tetragonitidae
Tetragonites sp. Kossmat 1895 ammonite
Bivalvia
 Trigoniida - Megatrigonioidae
Pterotrigonia klamathonia Anderson 1958 clam
 Trigoniida - Myophorelloidae
"? Litschkovitrigonia sp." = Steinmanella (Litschkovitrigonia)
"? Litschkovitrigonia sp." = Steinmanella (Litschkovitrigonia) clam
 Myalinida - Inoceramidae
Mytiloides sp. Brongniart 1822 clam