Index to Marine and Lacustrine Geological Samples (IMLGS)
LDEO [Contact the Curator]
1240 to 1190
room temperature, dry
1) blocky silty calcareous rocks, light colored; 2) more indurated, platy arcuate, rocks, light and dark. 3) dark-colored irregular (sub-aerially weathered?) rocks, most jagged and pointy.
When you refer to individual samples/data in the IMLGS, please cite each source repository whose data you use.
More Information and how to cite the IMLGS:
Use the Interactive Map Interface
Website of the US Dept of Commerce/NOAA/NESDIS/NCEI