The Ridge PetDB is a petrological database of igneous rock samples collected
on the ocean floor. It is a project funded by the National Science
Foundation (NSF), developed and maintained by the Lamont-Doherty ...
A collection of petrographic thin sections made from rock samples collected by
USGS field geologists in Alaska. Many of the sections have corresponding
descriptions cards; thin sections number 30,000. ...
[Adapted from "About the GSA Data Repository",
The above data set may be dowloaded from the Geological Society of
America (GSA) Data Repository, ...
Currently, the data set is comprised of approximately 450
granulometric analyses of 70 loose grain mineralogical preparations
from 30 geological sections of Seymour Island, Antarctica. The data