University of Northern Iowa

Petrology

The study of the origin, chemistry, distribution, and structure of rocks.

Displaying 1201 - 1300 of 1437
Cat. # Name Description
1201 1970.74.0558M Jaspilite Jasper, hematite, quartz.
1202 1970.74.0572M Limestone Crystalline limestone with serpentine.
1203 1970.74.0586M Jasper Lavic.
1204 1970.74.0594M Jasper None
1205 1970.74.0595M Carborundum Feldspar, orthoclase.
1206 1970.74.0596M Geode Thunder egg.
1207 1970.74.0600M Conglomerate Slice.
1208 1970.74.0601M Quartz, tiger eye Massive.
1209 1970.74.0602M Obsidian Gold sheen obsidian. Glued.
1210 1970.74.0620M Wonderstone None
1211 1970.74.0623M Basalt? None
1212 1970.74.0625M Sandstone None
1213 1970.74.0630M Conglomerate None
1214 1970.74.0631M Shale None
1215 1970.74.0635M Limestone Calcite crystals on fossiliferous limestone.
1216 1970.74.0645M Agate Brazilian agate.
1217 1970.74.0651M Sandstone None
1218 1970.74.0658M Geode None
1219 1970.74.0664M Apache tears None
1220 1970.74.0673M Obsidian Color: RD
1221 1970.74.0685M Pumice None
1222 1970.74.0687M Mica None
1223 1970.74.0692M Agate None
1224 1970.74.0700M Granite None
1225 1970.74.0701M Schist Mica schist?
1226 1970.74.0707M Jasper None
1227 1970.74.0709M Limestone Dendrites in matrix
1228 1970.74.0716M Pearlite None
1229 1970.74.0719M Turquoise On matrix.
1230 1970.74.0730M Agate Color: PK
1231 1970.74.0731M Wonderstone, Adirondack One small piece tumble-polished.
1232 1970.74.0734M Anorthosite With plagioclase feldspar.
1233 1970.74.0737M Sodalite, Canadian Tumbled.
1234 1970.74.0745M Tourmaline Black tourmaline in mica schist.
1235 1970.74.0768M Tremolite Crystals on dolometic limestone.
1236 1970.74.0774M Iron oxide Iron oxide on druzy quartz and dolomite.
1237 1970.74.0776M Lead oxide None
1238 1970.74.0781M Agate Ruin agate.
1239 1970.74.0783M Jade Mica inclusions.
1240 1970.74.0785M Jade Actinolite jade.
1241 1970.74.0787M Jade Black nephrite jade.
1242 1970.74.0788M Jade Includes both pink and green.
1243 1970.74.0791M Jade, actinolite jade With quartz.
1244 1970.74.0796M Psilomelane Manganese.
1245 1970.74.0811M Obsidian, rainbow None
1246 1970.74.0827M Obsidian Gold sheen obsidian.
1247 1970.74.0830M Obsidian Silver sheen obsidian.
1248 1970.74.0853M Conglomerate "Pudding stone."
1249 1970.74.0854M Travertine Calcite travertine. Fl. And strong phosphorescence. Color: YL,WH
1250 1970.74.0855M Aragonite, cave Crystals.
1251 1970.74.0859M Danonite None
1252 1970.74.0865M Slate None
1253 1970.74.0869M Spodumene None
1254 1970.74.0878M Schist Colored.
1255 1970.74.0886M Gabbro Altered. Porphyritic
1256 1970.74.0887M Iron ore Low grade.
1257 1970.74.0892M Jaspilite Jasper and Micaceous hematite.
1258 1970.74.0902M Deposit, cave None
1259 1970.74.0905M Covellite None
1260 1970.74.0922M Slag, iron None
1261 1970.74.0924M Jasper None
1262 1970.74.0926M Cone-in-cone Kiowa shale.
1263 1970.74.0930M Flint None
1264 1970.74.0943M Agate Snakeskin agate.
1265 1970.74.0956M Agate Carnelian agate.
1266 1970.74.0963M Zeolite None
1267 1970.74.0972M Chert None
1268 1970.74.0979M Limestone Oolitic limestone.
1269 1970.74.0992M Tufa None
1270 1970.74.0997M Colemanite None
1271 1970.74.1009M Agate Fire agate.
1272 1970.74.1010M Chrysacola None
1273 1970.74.1013M Sandstone Sand crystals.
1274 1970.74.1015M Geode Agatized coral.
1275 1970.74.1018M Nodule None
1276 1970.74.1029M Hornfels None
1277 1970.74.1041M Fluorspar None
1278 1970.74.1066M Jasper None
1279 1970.74.1067M Chert Conglomerate iron stained.
1280 1970.74.1069M Granite Gray biotite granite.
1281 1970.74.1088M Flint Rainbow flint rock.
1282 1970.74.1095M Breccia None
1283 1970.74.1096M Chert Chert or red jasper.
1284 1970.74.1103M Slag None
1285 1970.74.1105M Flagstone None
1286 1970.74.1119M Marble None
1287 1970.74.1130M Limestone With calcite crystals
1288 1970.74.1136M Marble Color: GY
1289 1970.74.1137M Conglomerate None
1290 1970.74.1163M Limestone Limestone with chlorite (green mica) on the end.
1291 1970.74.1181M Soapstone Serpentine soapstone.
1292 1970.74.1182M Quartz, feldspar, mica None
1293 1970.74.1185M Quartz, rose Massive. 1 pc. is opal.
1294 1970.74.1189M Breccia None
1295 1970.74.1191M Concretion Unusual rock formations.
1296 1970.74.1209M Hickorite None
1297 1970.74.1217M Sandstone, zebra None
1298 1970.74.1218M Sandstone None
1299 1970.74.1222M Rock, feather None
1300 1970.74.1236M Lepidolite None
CSV