Where: Northern Mariana Islands (15.2° N, 145.8° E: paleocoordinates 15.2° N, 148.0° 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) marly facies; 6) rubbly limestone facies; 7) equigranular limestone facies; 8) INEQUIGRANULAR LIMESTONE FACIES.
• group of beds-level stratigraphic resolution
Environment/lithology: lithified, shelly/skeletal 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 43371: authorized by Austin Hendy, entered by Austin Hendy on 12.08.2004
Creative Commons license: CC BY (attribution)