ammonites
Margaret's quarry, Ottawa (Ordovician of Canada)

Also known as Foster's quarry, Ottawa embayment

Where: Ontario, Canada (45.4° N, 75.7° W: paleocoordinates 25.5° S, 52.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Lowville Formation (Ottawa Group), Turinian (460.9 - 449.5 Ma)

• "from the Lowville" (Flower, 1964 p. 121). The Lowville Formation of the Ottawa embayment belongs to the Ottawa Group. These beds are also referred to as Gull River Fm. (see fig. 2 in Salad Hersi & Dix, 1999, Can. J. Earth Sci. 36(12)) and are Turinian in age (Mitchell et al., 2004, Palaeogeogr. Palaeoclimat. Palaeoecol. 210(2-4)).

• group of beds-level stratigraphic resolution

Environment/lithology: limestone

• "epicontinental platform" (Salad Hersi & Dix, 1999)
• The Lowville comprises different types of limestone, covering almost the whole range of carbonate lithofacies (Salad Hersi & Dix, 1999). Nothing is said in Flower (1964) about the host rock of the cephalopods recovered from the Margaret's quarry.

Size class: macrofossils

Reposited in the USNM

• RHF = collection of Rousseau H. Flower, transferred to the Smithsonian Institution/U.S. National Museum (see Wolberg, 1990, J. Paleont. 64(3, 5, 6))

Primary reference: R. H. Flower. 1964. The Nautiloid Order Ellesmeroceratida (Cephalopoda). State Bureau of Mines and Mineral Resources, New Mexico Institute of Mining and Technology, Memoir 12:234 p. [B. Kröger/T. Liebrecht] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 89006: authorized by Björn Kröger, entered by Torsten Liebrecht on 28.04.2009