Concretions are cemented bodies of sediment that are found in sedimentary rock or soil and mostly spherical in shape.
Excellent specimen of Staurolite twins on matrix from Russia! Three distinct crosses are visible on this aesthetic large miniature measuring 8 cm by 7 cm. From Keivy, Kola Peninsula, Russia. From the Kevin Ward collection. Photography by Kevin Ward
Nature is Awesome x∞ added 277 new photos to the album: Earth Geology + General Terrestrial Phenomenon — with Dussandanilo Torroja Urquhart and 4 others.