Where: Northern Mariana Islands (15.2° N, 145.8° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Tagpochau Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• The Tagpochau Limestone is a complex of calcareous clastic rocks that integrade with one another. The limestone appears to span the Indonesian Tertiary e interval or early Miocene age. Six lithic facies and two members are recognized in the Tagpochau Limestone, and include: 1) Donni Sandstone Member; 2) Machegit conglomerate Member; 3) transitional facies of calcareous tuff and marl; 4) TUFFACEOUS LIMESTONE FACIES; 5) limestone facies; 6) rubbly limestone facies; 7) equigrannular limestone facies; 8) inequigranular limestone facies. The collection is from the Donni Sandstone member occurs near the middle of the formation.

• group of beds-level stratigraphic resolution

Environment/lithology: poorly lithified, tuffaceous, shelly/skeletal, brown limestone

Size class: macrofossils

Collection methods: quarrying,

• Collections probably reposited in USNM collections, but this is not stated.

Primary reference: P. E. Cloud, Jr, R.G. Schmidt, and H.W. Burke. 1956. Geology of Saipan, Mariana Islands: Part 1. General Geology. United States Geological Survey Professional Paper 280(A):1-126 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 43365: authorized by Austin Hendy, entered by Austin Hendy on 12.08.2004

Creative Commons license: CC0 (CC0)