Postcards from the Field
- Carbonate rocks in New Mexico
- Water Data Initiative team takes field trip to Pecos Valley Artesian Conservation District
- NM Bureau of Geology hosts the USGS during sample collection at the Copper Flat Mine near Hillsboro New Mexico
- Are mine dumps in NM a source for critical minerals?
- Tracing igneous rocks into the High Plains
- Geologic model of hydrostratigraphic units under the northwestern Albuquerque Basin
- Up close and personal with the real squished clasts of the Funzie Conglomerate
- Squished clasts show how rocks flow at the base of faults
- Erosion and soil loss in the San Juan Basin
- Rapakivi syenite dikes in the Gallinas Mountains
- Natural stairwell in Late Cretaceous Dakota Sandstone
- High gravels along the Pecos River
- Sills near and sills far!
- Bone from a huge ancient camel found in the San Marcial basin
- Hoodoo in Late Cretaceous sandstone
Carbonate rocks in New Mexico
April 17, 2023
Limestone and dolomite are carbonate sedimentary rocks generally formed in marine settings from the precipitation of calcium in seawater, often via biological processes. Limestones are rich in the calcium carbonate minerals aragonite and calcite, while dolomite contains the mineral dolomite (CaMg(CO3)2). These rocks may preserve fossils, helping geologists to determine the age of carbonate-containing formations. The porosity of some carbonate rocks can make them efficient petroleum reservoirs. Carbonate rocks are also excellent hosts for some types of ore deposits, such as Mississippi Valley Type lead-zinc deposits.