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Trilobite Rock, South Island (Cambrian of New Zealand)

Where: Nelson, New Zealand (41.0° S, 173.0° E: paleocoordinates 41.0° S, 173.0° E)

• outcrop-level geographic resolution

When: Lejopyge laevigata trilobite zone, Tasman Formation, Boomerangian (504.0 - 501.0 Ma)

• The limestone lense is approximately 10 meters thick and has presence of numerous trilobite exuviae. The Tuarangia paparua are most readily collected four to five meters above the base of the limestone lense.

•Originally given a minimum age of Merioneth. However, Mackinnon (1985) gives the age as late Middle Cambrian, and it is placed within the Boomerangian of the Australian scale. That correlates with Menevian (PJW).

•“Their correlations suggest an age for Trilobite Rock that is within the range of the Ptychagnostus cassis Subzone of the Leiopyge laevigata Zone (i.e., toward the upper limit of the Bolaspidella Zone of North America).”

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

• limestone lense

Size classes: mesofossils, microfossils

Preservation: cast, replaced with phosphate

Collection methods: chemical,

• The specimens are preserved as black phosphatic steinkerns.

Primary reference: R. A. Henderson and D.I. MacKinnon. 1981. New Cambrian inarticulate Brachiopoda from Australasia and the age of the Tasman Formation. Alcheringa 5(3/4):289-309 [P. Wagner/P. Wagner/P. Wagner] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 7897: authorized by Mark Patzkowsky, entered by Phil Borkow on 06.06.2000, edited by Pete Wagner

Creative Commons license: CC BY (attribution)