Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A) Location of the Tandilia System, Buenos Aires Province, Argentina, and geologic map of the Olavarría area (map made by MJ Arrouy in Corel Draw X7 software). (B) Lithostratigraphic section of Sierras Bayas and La Providencia Groups. (C) Stratigraphic section of the shallow marine and tidally influenced facies of the Cerro Negro Formation. Fm.–Formation, S–Siltstone, Fs–Fine sand, Mf–Medium sand, MISS-Microbially Induced Sedimentary Structure.
