CH/f279 - Matanginui Limestone, Chatham Islands (Eocene of New Zealand)

Where: Chatham Islands, New Zealand (43.8° S, 176.5° E: paleocoordinates 54.0° S, 155.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Matanginui Limestone Member (Te Whanga Limestone Formation), Waipawan (55.8 - 53.0 Ma)

• THICKNESS: Matanginui Limestone is approximately 25 m thick at the type section. STRATIGRAPHIC RELATIONS: Matanginui Limestone is the lower member of the Te Whanga Limestone and conformably overlies the Red Bluff Tuff, and is unconformably overlain by younger strata. AGE: It is assigned an Waipawan-Bortonian local stage=Ypresian-Bartonian age based on biostratigraphy from combination of faunal groups. The particular collection is dated as Late Waipawan=early Ypresian.

• bed-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, shelly/skeletal, white, calcareous grainstone

• Molluscan assemblages suggest warm, relatively shallow-water, undoubtfully oceasnic, with moderately deep water for part of the time (probably beyond shelf edge).
• Soft, white, poorly-bedded bryozoan-echinoid-foraminiferla-bivalve rich packstone

Size class: macrofossils

Collection methods: quarrying,

• Collections reposited in Institute of Geological and Nuclear Sciences (New Zealand Geological Survey) collections. Collected by MAC (1977)

Primary reference: H. J. Campbell, P. B. Andrews, A. G. Beu, P. A. Maxwell, A. R. Edwards, M. G. Laird, N. deB Hornibrook, D. C. Mildenhall, W. A. Watters, J. S. Buckeridge, D. E. Lee, C. P. Strong, G. J. Wilson and B. W. Hayward. 1993. Cretaceous-Cenozoic geology and biostratigraphy of the Chatham Islands, New Zealand. Institute of Geological and Nuclear Sciences Monograph 2:1-269 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 52450: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for all faunal groups. Identified by P.A. Maxwell, D.E. Lee, J.S. Buckeridge, I.W. Keyes, and R.F. Jenkins.
Chondrichthyes
 Plagiostomi - Squalidae
"Lamna obliqua" = Otodus obliquus
"Lamna obliqua" = Otodus obliquus Agassiz 1843 dogfish shark
 Lamniformes - Lamnidae
Carcharodon auriculatus Blainville 1818 white shark
 Lamniformes - Odontaspididae
Striatolamia macrota Agassiz 1843 sand tiger shark
 Hexanchiformes - Hexanchidae