ammonites
S3/f526 - Formation A, Thompson Creek (Ordovician of New Zealand)

Also known as V 1593; GS 9504

Where: New Zealand (40.7° S, 172.5° E: paleocoordinates 12.4° N, 171.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: A Formation, Gisbornian (460.9 - 456.1 Ma)

• STRATIGRAPHIC RELATIONS: Derived from "Formation A" (Golden Bay Group, undifferentiated upper part) is the youngest of the beds mapped in this region, overlying Member 3 of the Slaty Creek Formation. THICKNESS: Minimum thickness of 600 m, maximum of no more than 1000 m. AGE: "Formation A" contains graptolites representing the the Zone of Dicellograptus, of lower Gisbornian age. STRATIGRAPHIC POSITION: From upper part of formation.

• bed-level stratigraphic resolution

Environment/lithology: deep-water; lithified, gray, green siltstone and fine-grained sandstone

• ENVIRONMENT: Slope or base of slope environment.
• SPECIFIC LITHOLOGY: Pale grey-green siltstone and fine sandstone. LITHIFICATION: Lithified, assumed on the basis of age and figured specimens.

Size class: macrofossils

Reposited in the IGNS

Collection methods: bulk,

• COLLECTOR: Collected by D.G. Biship, R. Ryburn, and D.S. Ker (reported in Bishop, 1965)l re-collected by A.J. Wright and R.A. Cooper (1966-1968). REPOSITORY: New Zealand Geological Survey (now GNS Science), Lower Hutt, New Zealand

Primary reference: R. A. Cooper. 1979. Ordovician Geology and Graptolite faunas of the Aorangi Mine area, North-west Nelson, New Zealand. New Zealand Geological Survey Paleontological Bulletin 47 [A. Miller/A. Hendy] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 63445: authorized by Austin Hendy, entered by Austin Hendy on 15.08.2006

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)