Where: Dukes County, Massachusetts (41.4° N, 70.8° W: paleocoordinates 41.5° N, 67.9° W)

• coordinate stated in text

When: Neogene (23.0 - 2.6 Ma)

• The age of the clay has not previuosly been determined because it lacks calcareous fossils. Sporomorphs are much more similar to those of R1280 (Collection number 231796) than to those of R1267 (Collection number 231784); thus, the ferruginous clay is probably Pliocene in age. Overlying R1267 and underlying R1280.

Environment/lithology: marine; ferruginous, glauconitic claystone

Size class: microfossils

Preservation: original sporopollenin

Collected by C. A. Kaye; reposited in the USGS

Collection methods: bulk, chemical, hydrochloric, hydroflouric,

• Stored at the U.S. Geological Survey, Reston, Va.

Primary reference: N. O. Frederiksen. 1984. Stratigraphic, Paleoclimatic, and Paleobiogeographic Significance of Tertiary Sporomorphs from Massachusetts. Geological Survey Professional Paper 1308:1-35 [P. Jardine/H. Morck/H. Morck]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 231795: authorized by Phillip Jardine, entered by Hannah Morck on 11.09.2023

Creative Commons license: CC BY (attribution)