ammonites
Koonwarra (Cretaceous of Australia)

Also known as PL425

Where: Victoria, Australia (38.6° S, 146.0° E: paleocoordinates 77.8° S, 115.4° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Strzelecki Group, Aptian (125.5 - 112.0 Ma)

• THE KOONWARRA FOSSIL BED of South Gippsland, Australia, is =8 m thick, and the invertebrate fossils occur mainly on the lower strata just above an apatite layer dated 118 ± 5 million yr old and below a layer dated 115 ± 5 million yr old (Drinnan & Chambers 1986, Jell & Duncan 1986).

• group of beds-level stratigraphic resolution

Environment/lithology: pond; claystone and siltstone

• "Numerous aquatic and semiaquatic insects in this bed, and the finely stratified mudstone that contains them, indicate a shallow pond with marshy edges that received periodic muddy influx from a larger adjacent lake." Hamilton, 1992
• "siltstone"; "finely banded claystones and subordinate feldspathic siltstones"

Size class: mesofossils

Preservation: adpression

Collected by Talent, Duncan, Handby in 1961

Collection methods: bulk, quarrying, mechanical, sieve,

Primary reference: J. A. Talent, P. M. Duncan, and P. L. Handry. 1966. Early Cretaceous feathers from Victoria. The Emu 64(2):81-86 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 77192: authorized by John Alroy, entered by John Alroy on 28.12.2007, edited by Matt Carrano and Jered Karr

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