Meteorite List Archives for [meteorite-list] Geologic Names and Usage: A Guide to (North American) Stratigraphic Nomenclature

John Lutzon wrote:

 > Thank you Paul - great leads.

You are welcome.

There is also:

Geolex ? Stratigraphic Resources
https://ngmdb.usgs.gov/Geolex/stratres

North American Commission on Stratigraphic Nomenclature,
2005. North American stratigraphic code. AAPG Bulletin, 89(11), 
pp.1547-1591.
https://ngmdb.usgs.gov/Geolex/resources/docs/NACSN_Code_2021.pdf

Yours,

Paul H.