Click here to see a photo of a concentrically zoned calcite concretion from the Zia Formation, NM.

Click here to see a photo of a dangerous siderite concretion (nucleated on an unexploded shell). The concretion is from a salt marsh in England that was used for weapons testing by the military. (Photo courtesy of Stuart Burley, University of Manchester/British Geological Survey.)

Click here to see elongate concretions from the Sierra Ladrones Formation. These concretions formed parallel to the groundwater flow direction.

Click here to see huge elongate concretions (10 meters long) from the Zia Formation. These concretions formed parallel to the groundwater flow direction.

Click here to see a photo of outcrops of the Santa Fe Group in San Lorenzo Canyon near Socorro, NM.

Check out the Geol 318, Sedimentary Rocks and Processes homepage for more photos.

Click here to see cleavage refraction in Proterozoic metasediments, Manzano Mountains, NM.

This photo shows preferential cementation of the Sand Hill fault by calcite. Because the sediments outside of the fault zone are unconsolidated, the cemented fault forms a wall. See the faults and fluid flow home page for details.

The Geophysics homepage has some great photos.

The New Mexico Bureau of Geology and Mineral Resources has a collection of photographs of minerals from New Mexico.