ammonites
Arisaig BC 4-2 (Silurian of Canada)

Where: Nova Scotia, Canada (45.6° N, 62.0° W: paleocoordinates 37.5° S, 31.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Beechhill Cove Formation, Llandovery (443.7 - 428.2 Ma)

• Underlying volcanics Rb-Sr date at earliest Llandovery- latest Ashgillian. Beechill Cove Fm. unconformably/disconformably overlies these.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, burrowed, silty sandstone

• Fine sandstones, coarse siltstones, up to 50 cm thick beds. Basal surfaces are sharp, erosive, scoured up to 25 cm deep. Considerable internal variation: graded beds of shells, parallel lamination, cross-lamination, one bed of hummocky cross-stratification.

Primary reference: R. K. Pickerill and J. M. Hurst. 1983. Sedimentary facies, depositional environments, and faunal associations of the lower Llandovery (Silurian) Beechill Cove Formation, Arisaig, Nova Scotia. Canadian Journal of Earth Sciences 20:1761-1779 [J. Alroy/M. Sommers] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 3221: authorized by John Alroy, entered by Mike Sommers on 27.07.1999

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