ammonites
Guimarota (Jurassic of Portugal)

Where: Leiria, Portugal (39.7° N, 8.8° W: paleocoordinates 33.7° N, 1.8° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Alcobaça Formation, Kimmeridgian (155.7 - 150.8 Ma)

• two lignite coal layers wth vertebrate fossils. Dated as Oxfordian based on microflora, Kimmeridgian based on ostracods. Recent work (Schudack 1993) favors Kimmeridgian.

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal; coal

• The dominant plants (Schizoneura (?) and Equisetum) "are assumed to have lived in a shallow lagoon of fresh to brackish water, whereas the other elements may have drifted in from a nearby coast"
• "marly lignite coals"

Size classes: macrofossils, mesofossils, microfossils

Preservation: mold/impression

Collection methods: surface (in situ), mechanical,

Primary reference: C. Brauckmann. 1978. Beitrag zur Flora der Grube Guimarota (Ober-Jura; Mittel-Portugal). Geologica et Palaeontologica 12:213-222 [A. Rees/A. Rees/A. Rees] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 24563: authorized by Allister Rees, entered by Allister Rees on 09.08.2002, edited by Meg Hall, Matt Carrano, Kaitlin Maguire, Roger Benson and Philip Mannion