jaspilite sedimentary rocks

actinolite and argillite backgrounds bituminous breccia brownstone california catlinite chert chlorite collection colombia for geological geologists geology greenstone hexagonite jaspilite massachuset minerals minnesota new obteined oklahoma ottrelite phyllite phyllitesedimentary quebec rocks sample sandstone schist sedimentary sericite sioux soapstone soils study talc textures vermont virginia york