ammonites
District of Mackenzie, Clear Creek Section, Unit 5 (Ordovician of Canada)

Where: Northwest Territories, Canada (65.4° N, 136.2° W: paleocoordinates 10.3° N, 56.7° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Middle Ordovician (471.8 - 460.9 Ma)

• No group or formation names given. Collection taken from 221 feet above base. Possibly Middle Ordovician.

Environment/lithology: shallow subtidal; gray limestone

• "Covered interval, float of aphanitic limestone, dark grey, weathers grey, bedding medium to thick; white calcite fissures."

Size classes: macrofossils, microfossils

Collection methods: Collection includes a small gastropod and brachiopod. Ostracod identified by Copeland.

Primary reference: B. S. Norford. 1963. Reconnaissance of the Ordovician and Silurian rocks of Northern Yukon Territory. Geological Survey of Canada Department of Mines and Technical Surveys, Paper 63-39 1-139 [S. Holland/T. Hanson/T. Hanson] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 25510: authorized by Steven Holland, entered by Tori Hanson on 14.09.2002