By: magic-gigapans
Image: Callan Bentley, Mid-Atlantic Geo-Image Collection
License: Creative Commons Non Commercial ⧉

Uploaded: 14 Apr 2020
Last Updated: 29 May 2020

2.16 gigapixels
49,295 x 43,742 pixels
164.3 in X 145.8 in at 300dpi
7,031 pixels per inch

Folded foliation visible in a xenolith within San Carlos migmatite, Cordoba province, Argentina. Locality approx. 31° 20’45’’S 64° 54’45” W by the road from Tala Canada in the west to San Jeronimo in the east. San Carlos migmatite (496 to 506 Ma U-Pb age) is a tonalitic to granodioritic partial melt that often contain garnets and cordierite and intrudes previously foliated and crenulated biotite-rich gneisses and other metasedimentary rocks. The gneiss inclusions, which do not usually contain either garnet or cordierite, have a halo of leucosome (paler colored) around them. Sample from the structural geology collection of Carol Simpson and Declan De Paor.