| Heading | Topics |
|---|
| Welcome Page NEW | Turnstone Logo, Summary and Contact Information |
| Summary | Profile; sommaire en français; resumen en español |
| 1-page Summary, Oct. 2022 NEW | WHAT WE DO |
| Contents Page | Directory of Contents |
|
| --- Central Route to Major Topics |
| | |
| | BOOKS (notices, summaries) |
| | BOOK: "The Last Billion Years: A Geological History of the Maritime Provinces of Canada" (2nd edition), 2022 |
| | BOOK: "Algonquin Park's Mowat: Little Town of Big Dreams" by Mary Garland, 2015 |
| | BOOK: "Four Billion Years and Counting: Canada's Geological Heritage", 2014 |
...
| | |
| Introduction to Turnstone | A Brief Summary of Turnstone Activities and Products |
| | --- Includes the Following Vignettes: |
| | --- Indian Meteorites - List with Input from MINLIB [updated April 2012] |
| | --- Reflectance Spectra of the Rare Palladium Mineral, Cabriite |
| | --- Textures in Silica from a Mexican Precious-metals Vein Deposit |
| --- Introduction to the MINLIB Database |
| --- Graham Wilson - Select Bibliography & Public Presentations |
| | --- Geographic Location of Projects |
| | |
| Technical & Geopolitical Bibliographies |
| | --- Annotated |
| | --- 24 selections from MINLIB database |
| | --- 35 less-technical selections from MINLIB & WORLD |
| | --- a specific list for meteorites from India [updated April 2012] |
| | --- Six Dozen Diverse Links - updated Oct. 2018 |
| | |
| | --- Citations |
| | --- 25 titles from MINLIB: references for descriptive mineralogy |
| | --- 33 more titles: references for descriptive mineralogy, II |
| | --- Publications & Students of Frank W. Beales |
| | --- Publications of Eugen F. Stumpfl |
| --- Download some items in pdf format, including: |
| | Turnstone Glossary of Petrographic Terms [127 kb] - update of January 2015 |
| | Compact Catalogue of Canadian Meteorites [75 kb] - update of March 2017 |
| | Bibliography of Canadian Meteorites [2589 kb] - first released June 2012, with update |
| Escott Reid, Canadian Diplomat [79 kb] |
| |
| | |
| Site Map | This page, a more-detailed listing of currently-available content |
| Local Information | Geology and Natural History, Campbellford area, Northumberland county, Ontario |
| | -- Introductory Notes |
| | --- Bibliography of the District |
| | --- Seymour township bird list |
| | --- Seymour township flora and fauna |
| | --- Crowe Bridge Conservation Area show |
| | ---- Introduction to Local Geology |
| | ----- Precambrian (Grenville) Shield |
| | ----- Paleozoic (Ordovician) Limestones |
| | ----- Quaternary Geology |
| | ------ News: |
| | ------- The Norwood Fireball Event of 06 May 2001 |
| | ------- The Pennsylvania Fireball Event of 23 July 2001 |
| | --------- Links to other Web Sites |
| Slide Show | Lake Superior Geology -- Multi-Audience Slide Show |
| | --- Junior Tour |
| | --- Standard Tour |
| | --- Advanced Tour |
| Rocks, Minerals, Meteorites and | Other Natural and Artificial Curios |
| 1. Cannel Coal | An Unusual Carbonaceous Rock |
2. Moganite - Silica Revisited?
| Brief Notes and Bibliography |
| 3. The "Rock of the Month" | with select "Museum Moments" (MM) |
| 2001 | --- #1 ---- Apatite & orange calcite from Renfrew County, Grenville province, Ontario |
| NEW | --- #2 ---- Apatite & biotite from the Bancroft area, Grenville province, Ontario |
| | --- #3 ---- Meteorite recognition |
| | --- #4 ---- Cinnabar, mercury ore from Almaden, Spain |
| | --- #5 ---- Violarite, nickel ore from Sudbury, Ontario |
| | --- #6 ---- Opal in Volcanic rock from Honduras |
| 2002 NEW | --- #7 ---- Holbrook meteorite (Arizona, U.S.A.) |
| | --- #8 ---- Berthierite, Iron-antimony sulphide from Borneo |
| | --- #9 ---- Charnockite, a deep and meaningful granitoid rock (Baffin Island, Nunavut) |
| | --- #10 --- Stibnite from South Africa |
| | --- #11 --- Fossil bryozoan from southern Ontario |
| | --- #12 --- Banded sphalerite from Nanisivik, Baffin Island, Nunavut |
| NEW | --- #13 --- Gabbro boulder, southern Ontario |
| | --- #14 --- Corundum (ruby & sapphire) from India |
| | --- #15 --- Cabriite (a palladium mineral) from Noril'sk, Russia |
| | --- #16 --- Chert & chalcedony (Pennsylvania, U.S.A.) |
| | --- #17-18 Double take: igneous rocks from Earth & space |
| 2003 | --- #19 --- Thallium in nature (Utah, U.S.A.) |
| NEW | --- #20 --- Silver ore, Fresnillo, Zacatecas, Mexico |
| | --- #21 --- Native gold from California, U.S.A. |
| | --- #22 --- Pyroxmangite (`rhodonite') from Colorado, U.S.A. |
| | --- #23 --- Chert & microfossils (Pennsylvania, U.S.A.) |
| | --- #24 --- Chert provenance (Pennsylvania, U.S.A.) |
| | --- #25 --- Diamonds from Africa |
| | --- #26 --- Diamond and carbonado, Siberia & Africa |
| | --- #27 --- Copper-rich slag, Belleville, Ontario |
| | --- #28 --- Gabbro boulder, Marmora, Ontario |
| | --- #29 --- Shap granite, Lake District, England |
| | --- #30 --- Ross of Mull granite, Scotland |
| 2004 | --- #31 --- Allivalite, Rhum, Scotland |
| | --- #32 --- Appinite, Strontian area, Scotland |
| | --- #33 --- Cylindrite from Bolivia |
| | --- #34 --- Flint walls, Essex, England |
| | --- #35 --- Green mica in gold ore, Western Australia |
| | --- #36 --- Pyrite from Navajun, Spain |
| | --- #37 --- Fulgurite from Ontario |
| | --- #38 --- Ice - a mineral! |
| | --- #39 --- A Young plutonic rock from Borneo |
| | --- #40 --- Cobalt-nickel arsenide Ore, Cobalt district, Ontario |
| | --- #41 --- NWA 1463 Winonaite (rare achondrite meteorite), Northwest Africa |
| | --- #42 --- Pyrite from Nanisivik, Baffin Island, Nunavut |
| 2005 | --- #43 --- Khondalite from Kerala, south India |
| NEW | --- #44 --- Silicides in fulgurite and ferrosilicon |
| | --- #45 --- Chrysocolla from Wyoming, U.S.A. |
| | --- #46 --- Graphite from the Bushveld of South Africa |
| | --- #47 --- Granitic pegmatite from the Grenville province of S.E. Ontario |
| | --- #48 --- Zinc-lead vein from the Grenville province of S.E. Ontario |
| | --- #49 --- Moorabie L3.8 chondrite, a meteorite from N.S.W., Australia |
| | --- #50 --- Calcic anorthosite, northern Ontario |
| NEW | --- #51 --- Forsterite marble, Glenelg, Scotland |
| | --- #52 --- Titaniferous metagabbro, Norway |
| | --- #53 --- Halleflinta from southwest Wales |
| | --- #54 --- Granite boulders of southeastern Wyoming, U.S.A. |
| 2006 NEW | --- #55 --- Tektites from China |
| | --- #56 --- Lamprophyre (intermediate porphyry), Rossland, British Columbia |
| | --- #57 --- Pulaskite (syenite), Rossland, British Columbia |
| NEW | --- #58 --- Grenville marbles of S.E. Ontario (and note on rock identification) |
| | --- #59 --- Sphalerite-rich ore, Lake District, N.W. England |
| | --- #60 --- UG-2 chromitite, Bushveld complex, South Africa |
| | --- #61 --- Umangite: selenides from Moravia and Saskatchewan |
| | --- #62 --- Mineralized andesite, Guanajuato, Mexico |
| | --- #63 --- Jasperoid, Jerritt Canyon, Nevada, U.S.A. |
| | --- #64 --- Anthraxolite hydrocarbon, Sudbury, Ontario |
| | --- #65 --- Odegaardite, metagabbro from Norway |
| | --- #66 --- Lepidolite, Harding pegmatite, New Mexico |
| 2007 | --- #67 --- Rucklidgeite, rare telluride, N.E. Ontario |
| | --- #68 --- Sulphidic charnockite, Kodaikanal, south India |
| | --- #69 --- Dumortierite from Chile |
| | --- #70 --- Jade from northern British Columbia |
| | --- #71 --- Oxide-rich pegmatite, Grenville province, S.E. Ontario |
| | --- #72 --- Palaeobeach with igneous pebbles, Cuba |
| | --- #73 --- Amethyst, Thunder Bay, N.W. Ontario |
| | --- #74 --- Siltstone cobble, Slate Islands, N.W. Ontario |
| | --- #75 --- Shatter cone, Slate Islands, N.W. Ontario |
|
NEW | --- #76 --- Chert from the Crowe valley, S.E. Ontario |
| | --- #77 --- Native gold from Guyana |
| | --- #78 --- Native gold from Timmins, Ontario |
| 2008 ---
| --- #79 --- Fractured flint from Essex, England |
| | --- #80 --- Pyritic gold ore, Hemlo, Ontario |
| NEW | --- #81 --- Sperrylite, Sudbury, Ontario |
| | --- #81b -- Sperrylite, Sudbury, Ontario (.pdf, 138 kb) |
| NEW | --- #82 --- Slickensides in peridotite, northwest Ontario |
| | --- #83 --- NWA 869 chondrite meteorite, Morocco |
| | --- #84 --- Concretion, northwest Ontario |
| | --- #85 --- Calcite from Zacatecas, Mexico |
| | --- #86 --- Gibeon iron meteorite, Namibia |
| | --- #87 --- Azurite from Spain |
| | --- #88 --- Banded iron formation, Western Australia |
| | --- #89 --- Brecciated chert, Western Australia |
| | --- #90 --- Scapolite from Quebec |
| 2009 ---
NEW | --- #91 --- Grenville corundum, east of Bancroft, Ontario |
| | --- #92 --- Orbicular granite, coast of northern Chile |
| NEW | --- #93 --- Campo del Cielo iron meteorite, Argentina |
| NEW | --- #94 --- Agrellite and eudialyte, Kipawa, Quebec |
| | --- #95 --- Green micaceous gold ore, Hemlo, Ontario |
| | --- #96 --- Bournonite from Pulacayo, Bolivia |
| | --- #97 --- Massive sulphide bear & bird folk-art carvings (Sudbury, Ontario) |
| | --- #98 --- Banded iron formation, south India |
| | --- #99 --- Galena, quartz and orpiment, Peru |
| | --- #100 --- Pegmatitic granite from Tregonning-Godolphin stock, Cornwall, England |
| | --- #101 --- Tourmaline-rich granitic breccia from Wheal Remfry, Cornwall, England |
| | --- #102 --- Perthitic granite pegmatite, Grenville province, Ontario |
| 2010 ---
| --- #103 --- Amazonite feldspar from Quebec |
| | --- #104 --- Dhofar 485 howardite meteorite, Oman |
| | --- #105 --- Amazonite feldspar from Sidamo, southern Ethiopia |
| | --- #106 --- Native copper and datolite, northern Michigan, U.S.A. |
| | --- #107 --- Apatite and phlogopite, Palabora, South Africa |
| | --- #108 --- Basaltic volcanic bomb, Mount Fuji, Japan |
| NEW | --- #109 --- Crocoite from Tasmania, Australia |
| | --- #110 --- Sea salt (in essence, "synthetic halite") from Essex, England |
| | --- #111 --- Graptolite fossils from Dyfed, Wales |
| | --- #112 --- Brucite ophicalcite (marble) from Skye, Scotland |
| | --- #113 --- Minium from Colorado and Arizona, U.S.A. |
| | --- #114 --- Peperite identified in outcrop in Tigrai, Ethiopia |
| 2011 --- NEW | --- #115 --- Chalcopyrite ore, McCreedy West mine, Sudbury, Ontario |
| | --- #116 --- Springwater pallasite meteorite, Saskatchewan |
| | --- #117 --- Bencubbin CBa bencubbinite meteorite, Western Australia |
| | --- #118 --- Gujba CBa bencubbinite meteorite, Nigeria |
| | --- #119 --- NWA 5425 H4 chondrite meteorite, Morocco |
| | --- #120 --- Tourmalinite from Botallack, Cornwall, England |
| | --- #121 --- Putorana metal-rich basalt / pseudometeorite, Siberia |
| | --- #122 --- Calcite, Grenville province, Ontario |
| | --- #123 --- Fulgurite, Grant county, Nebraska, U.S.A. |
| | --- #124 --- Fulgurite, Florence, Arizona, U.S.A. |
| | --- #125 --- Chrome diopside, Russia |
| | --- #126 --- Native silver in vein, Silver Islet, Thunder Bay area, Ontario |
| 2012 ---
| --- #127 --- Seymchan pallasite / iron meteorite, Siberia |
| | --- #128 --- Chiastolite-muscovite schist pebble, Newfoundland |
| | --- #129 --- Toluca iron meteorite, Mexico |
| | --- #130 --- Basalt, Bay of Fundy, Nova Scotia |
| | --- #131 --- Vanadinite from Morocco |
| | --- #132 --- Mimetite, cerussite, sphaerocobaltite, Morocco |
| | --- #133 --- Erythrite from Bou Azzer, Morocco |
| | --- #134 --- Apophyllite from northern San Luis Potosi, Mexico
(MM01) |
| | --- #135 --- Covert H5 ordinary chondrite meteorite, Kansas, U.S.A. |
| | --- #136 --- Allende CV3 carbonaceous chondrite meteorite, Mexico |
| | --- #137 --- Stibnite, antimony ore from Romania
(MM04) |
| | --- #138 --- Eudialyte syenite from Kipawa, Quebec
(MM02) |
| 2013 ---
| --- #139 --- Fossil "surprise" cephalopods from Nepal |
| | --- #140 --- Blue John fluorite, Derbyshire, England
(MM03) |
| NEW | --- #141 --- Fossiliferous basalt (no, really!) from Iceland |
| | --- #142 --- Zeolites and apophyllite from Pune (Poona), Maharashtra, India |
| | --- #143 --- Native "float copper" from Houghton county, Michigan, U.S.A.
(MM05) |
| | --- #144 --- Keweenawan peridotite of the Midcontinent Rift, Eagle project, Michigan, U.S.A. |
| | --- #145
--- NWA 1242 mesosiderite, a stony-iron meteorite, Libya |
| | --- #146 --- Chelyabinsk LL5 brecciated ordinary chondrite meteorite, Russia |
|
| --- #147 --- Andesite lava from Poas volcano, at Bosque de Paz, Costa Rica |
| | --- #148 --- Silica-flooded sulphidic ore, Mineral de Pozos, Guanajuato, Mexico |
| | --- #149 --- Grenville metagabbro from Cordova (gold) Mines, Ontario |
| | --- #150 --- Coronitic Grenville metagabbro, Muskoka district, Ontario |
| 2014 ---
NEW | --- #151 --- Gebel Kamil nickel-rich iron meteorite, Egypt |
| | --- #152 --- Quartz-wolframite (tin- tungsten) ore, greisen, Cligga Head, Cornwall, England |
| NEW | --- #153 --- Gold skarn with arsenopyrite, Osoyoos, southern Okanagan, British Columbia |
| | --- #154 --- Classification of NWA (Northwest Africa) "black chondrite" meteorite, NWA 12807 |
| | --- #155 --- Dunitic mantle xenolith from Mount Leura, western Victoria, Australia |
| NEW | --- #156 --- Historic "soccer ball" tektite from the Philippines |
| | --- #157 --- Manganese ores, Kalahari manganese field, South Africa |
| | --- #158 --- Gold-silver tellurides, Colorado, U.S.A., I |
| NEW | --- #159 --- Lapilli tuff / cherty sediment of Sudbury impact event, central Ontario |
| NEW | --- #160 --- Spotted dolerite and volcanic tuff, Dyfed, southwest Wales |
| | --- #161 --- Gold-silver tellurides, Colorado, U.S.A., II |
| | --- #162 --- NWA 5731, LL3.2 chondrite meteorite, Morocco |
| 2015 ---
| --- #163 --- Mesozoic ammonite fossil, Madagascar |
| --- #164 --- Botryoidal hematite, iron oxide from Bou Azzer, Morocco |
| --- #165 --- Sand-infused gypsum "rose", Aransas Pass, Texas, U.S.A. |
| --- #166 --- Unusual amphibole from the Grenville province, Ontario |
| --- #167 --- Titanite (sphene) from the Grenville province, Ontario |
| --- #168 --- Echinodermata in lithographic stone, Solnhofen, Bavaria, Germany |
| NEW | --- #169 --- Biotite Leucogranite as Decorative Stone |
| --- #170 --- NWA 6136 CO3 carbonaceous chondrite meteorite, Morocco |
| --- #171 --- Copper-germanium ore, Tsumeb, Namibia |
| --- #172 --- Pyrite sun (concretion), Illinois, U.S.A. |
| --- #173 --- Maslyanino iron meteorite with silicate inclusions, Russia |
| --- #174 --- Quartzite from Quandary Peak, Colorado, U.S.A. |
| 2016 ---
| --- #175 --- "Zebra rock", a lead-zinc-silver ore from Colorado, U.S.A. [+ state index] |
| --- #176 --- Slag from the Durango mining district, Colorado, U.S.A. |
| --- #177 --- Native osmium from the Urals of Russia |
| --- #178 --- Porphyritic metabasite from China |
| NEW | --- #179 --- Textures in a rapakivi granite, Beijing, China [+ Latest China index] |
| --- #180 --- Arsenic sulphides, realgar and orpiment, from China |
| NEW | --- #181 --- Traumatocrinus, exceptional crinoid fossil from China |
| --- #182 --- Pyrolusite dendrites in the Atacama desert, Chile |
| --- #183 --- The bivalve Glycimeris in the Pliocene Red Crag of Essex, England |
| --- #184 --- Breithauptite, nickel antimonide, from Cobalt, Ontario |
| --- #185--- Trilobite from Morocco, north Africa |
| --- #186 --- Prismatic beryl from China |
| 2017 ---
| --- #187 --- Burrow, a trace fossil from the Lower Chalk of Norfolk, England |
| --- #188 --- NWA 10637, NWA 6292 & NWA 5363 brachinite(-like) achondrite meteorites |
| --- #189 --- Gastropods old and new |
| --- #190 --- Massive copper-PGE ore, Broken Hammer deposit, Sudbury, Ontario |
| --- #191 --- Keweenawan Mellen gabbro / gabbroic anorthosite, northern Wisconsin, U.S.A. |
| --- #192 --- Nickel smelter slag, Sudbury, Ontario |
|
NEW | --- #193 --- Agoudal IIAB iron meteorite, Morocco |
| --- #194 --- Mount Dooling IC iron meteorite, W.Australia |
| --- #195 --- Smithsonite from Tsumeb, Namibia |
| --- #196 --- Galena, Madan ore field, Bulgaria |
| --- #197 --- Lodranite NWA 11129, an achondrite meteorite, Morocco |
| --- #198 --- Fluorescent zinc ore, New Jersey, U.S.A. |
| 2018 ---NEW
| --- #199 --- Wavellite from north Devon, England |
| --- #200 --- Galena crystal habits, Viburnum Trend, Missouri and Keno Hill, Yukon |
| NEW | --- #201 --- Mesosaurus, fossil reptile and mascot for Gondwanaland |
| --- #202 --- Tourmaline and lepidolite from southern California, U.S.A. |
| | --- #203 ---
Qingtian stone, superb lapidary material from China |
| | --- #204 --- Marble, York River zone, Bancroft, Ontario, Canada |
| | --- #205 --- Chromitite, Luobusa ophiolite, southern Tibet |
| | --- #206 --- Quartz as semi-precious stone |
| | --- #207 --- Massive jade as decorative piece |
| | --- #208 --- Shelly limestone, southeast Ontario |
| NEW | --- #209 --- Rich cassiterite tin ore, Cornwall, England |
| | --- #210 --- Serpentinized mantle peridotite, Gros Morne, western Newfoundland (MM06) |
| 2019 ---
NEW | --- #211 --- Tyndall Stone, bioturbated Ordovician limestone from southern Manitoba |
|
NEW | --- #212 --- The Oldest Rock: Acasta gneiss, Northwest Territories, Canada |
| NEW | --- #213 --- Giant lapilli & breccias, Sudbury impact event, Thunder Bay & Sudbury, Ontario |
| NEW | --- #214 --- Galena crystal habits, Peru and Bulgaria |
| NEW | --- #215 --- Sphalerite zinc ores, Long Lake, S.E. Ontario & Balmat, New York |
| NEW | --- #216 --- Saricicek howardite (Vestan achondrite) meteorite breccia |
| NEW | --- #217 --- Peridotite mantle xenoliths in basalt, North China craton, Hebei, China |
| NEW | --- #218 --- Echinoid fossils from the Eocene of Florida, U.S.A. |
| NEW | --- #219 --- Proterozoic tempestite, dolomite from Tianjin, China |
| NEW | --- #220 --- South African chromites (Bushveld UG-2 chromitite, II) |
| NEW | --- #221 --- Native iron from Russia, II |
| NEW | --- #222 --- Diamond indicator minerals, kimberlite from northern Michigan, U.S.A. |
| 2020 ---
NEW | --- #223 --- Ireland 1. Early Irish goldsmithing tools |
| NEW | --- #224 --- Ireland 2. Irish stone tools made of jadeitite from Italy |
| NEW | --- #225 --- Ireland 3. Extensional quartz veins, Cork and Kerry |
| NEW | --- #226 --- Camerina, Eocene fossil nummulite foraminiferan, Java, Indonesia |
| NEW | --- #227 --- Gao-Guenie H5 meteorite shower, Burkina Faso, and micrometeorites |
| NEW | --- #228 --- Orange barite from Jiangxi province, China |
| NEW | --- #229 --- Keichousaurus hui, Triassic reptile, China (MM07) |
| NEW | --- #230 --- Mica-rich pegmatitic leucogranite, Quetico subprovince, northwest Ontario |
| NEW | --- #231 --- Chert and fossils in limestone, southeast Ontario |
| NEW | --- #232 --- Gaspeite, nickel carbonate,in calcite, southeast Quebec |
| NEW | --- #233 --- Dronino sulphide-rich iron meteorite, Russia |
| NEW | --- #234 ---
Garnet skarn, Rossland, British Columbia |
| 2021 --- NEW | --- #235 ---
Volcanic rocks of the Pico de Orizaba volcano, Mexico |
| NEW | --- #236 ---
Porphyritic andesites, La Malinche volcano, Mexico |
| NEW | --- #237 ---
Glassy andesite ("pitchstone"), Popocatepetl volcano, Mexico |
| NEW | --- #238 --- Lodranite meteorite NWA 10155, NWA from or via Morocco |
| NEW | --- #239 ---
Kentallenite, a dark monzonite from western Scotland |
| NEW --- 20 YEARS! | --- #240 ---
Loop texture in Ni Cu Co sulphide ores, Nova mine, Western Australia |
| NEW | --- #241 ---
Trachytes from eastern Tigrai, northern Ethiopia |
| NEW | --- #242 ---
Pitchstones from the Isle of Arran, western Scotland |
| NEW | --- #243 ---
Crinanite (analcime olivine dolerite / diabase) from Arran |
| NEW | --- #244 ---
"Old Gabbro" of Ardnamurchan, Scotland |
| NEW | --- #245 ---
Craignurite, Isle of Mull, Scotland |
| NEW | --- #246 ---
Lamprophyre, Iona, Scotland [+ Latest Scotland index] |
|
2022 --- NEW | ---
#247 ---
Glanochthon angusta, Lower Permian amphibian, Germany (MM08) |
| NEW |
--- #248 ---
Crichtonsaurus bohlini, dinosaur, Liaoning, China
(MM09) [+ Latest China index] |
| NEW | --- #249 --- The Bleasdell Boulder, giant erratic of silicated marble, Ontario |
| NEW | --- #250 --- Stichtite from Tasmania - Mg-Cr carbonate |
| NEW | --- #251 --- Polymetallic Zn-Pb-Ag-Cu ores, Charcas, Mexico |
| NEW | --- #252 --- Pyromorphite from Wicklow, Ireland & Leadhills, Scotland |
| NEW | --- #253 --- Molybdenite from Boss Mountain, British Columbia |
| NEW | --- #254 --- Saint-Aubin IIIAB iron meteorite, France |
| NEW | --- #255 --- Brodick breccia, New Red Sandstone, Arran, Scotland |
| NEW | --- #256 --- Ordovician-age cherty limestone, Skye, Scotland |
| NEW | --- #257 --- Spodumene pegmatite, Plumbago North, Maine, U.S.A. |
| NEW | --- #258 --- Pahoehoe basalts, Hawaii & Iceland |
|
2023 --- NEW | ---
#259 ---
Obsidian from southern Iceland |
| NEW | --- #260 --- Park Forest, L5 meteorite shower, Illinois, U.S.A., 2003 |
| NEW | --- #261 --- Graphic granite, Havey pegmatite, Maine, U.S.A. |
| NEW | --- #262 --- Ptygmatic folds in Carboniferous evaporites, Hillsborough, New Brunswick |
| NEW | --- #263 ---
Strange spotty, stripey Ediacaran siltstone, East Kimberleys, W.Australia
|
| NEW | --- #264 --- Komatiite, Munro Township, Timmins, Ontario |
| NEW | --- #265 --- Ventifacts, southeast Iceland |
| NEW | --- #266 --- Millstone Grit, northeast Derbyshire, England |
| NEW | --- #267 --- Malachite, Democratic Republic of Congo |
| NEW | --- #268 --- Native arsenic from Sarawak, Borneo |
| NEW | --- #269 --- Agate, semi-precious stone |
| NEW | --- #270 --- Tranquillityite in dolerite (diabase), W.Australia |
|
2024 --- NEW | --- #271 --- Saratov, L4/LL4 meteorite fall, Russia, 1918 |
| NEW | --- #272 --- Torridonian & Cambrian sediments, Liathach, Scotland |
| NEW | --- #273 --- Eclogite, Glenelg, Scotland [+ Latest Scotland index] |
| NEW | --- #274 --- Amygdaloidal, zeolitic basalts, Iceland and beyond |
| NEW | --- #275 --- Pyrolusite dendrites, Emmons pegmatite, Maine, U.S.A. |
| NEW | --- #276 --- Graphite, Grenville province, southeast Ontario |
| NEW | --- #277 --- Agate again: styles of banding |
| NEW | --- #278 --- Ice, revisited: Iceland |
| NEW | --- #279 --- Fuchsitic QAM vein breccia, Kenilworth mine, Timmins, Ontario |
| NEW | --- #280 --- Native sulphur and celestine, Michigan, U.S.A. |
| NEW | --- #281 --- Sodalite syenite, Bancroft, Ontario, Canada (MM10) |
| NEW, DECEMBER | --- #282 --- Aba Panu L3.6 chondrite meteorite |
| | --- COMING SHORTLY: |
| | |
| | --- Economic geology: the underpinnings of modern society |
| | --- Rock of the Month Feature, now with 282 linked entries, 23 years, 2001-2024 |
| | |
| NEW | --- See also the Rock of the Month Thematic Index |
| | |
| | --- We've reached: ROM No.160 --- and now
ROM No. 200! |
| | --- Possible future items include: |
| | |
| | |
| | -- a. Done |
| | -- b. Basalt, Eldfjell, 1973 eruption, Heimaey, Iceland |
| | -- c. Done |
| | -- d. Gold ore from the Witwatersrand goldfield, South Africa |
| | -- e. Banded iron formation, Carshaw gold mine, Timmins, Ontario |
| | -- f. Schorl & garnet, pegmatite, Mount Mica, Maine |
| | -- g. Green carbonate gold ore, Kerr-Addison mine, Virginiatown, Ontario |
| | -- h. Scapolite in Grenville metagabbro, Chenaux, Quebec |
| | -- i. Metamorphosed sulphide ore, Werner Lake belt, Ontario |
| | -- j. Nepheline syenite |
| | -- k. Done |
| | -- l. The beauty of sand 1. - Cornwall |
| | -- m. The beauty of sand 2. - Iceland |
| | -- n. The beauty of sand 3. - Cuba |
| | -- o. The beauty of sand 4. - Oregon |
| | |
| | -- A. Basalt from Paricutin volcano, Mexico |
| | -- B. Distinctive igneous rock from Iceland: moberg |
| | -- C. Sandor ultramafic lamprophyre near Wawa, Ontario |
| | -- D. Pt-Pd ore, Stillwater complex, Montana, USA |
| | -- E. Chlorite (ripidolite), "low-key" sheet silicate |
| | -- F. Fossil brachiopod, England (?), TBA |
| | -- G. Loellingite (löllingite), Broken Hill, N.S.W., Australia |
| | -- H. Iron ore, northern Minnesota, U.S.A. |
| | -- I. Nickel-copper-PGE ore, northern Minnesota, U.S.A. |
| | -- J. Gypsum beds, Atacama desert, Chile (as 182) |
| | -- K. Lamproite |
| | -- L. Silver-cobalt ore, Cobalt, Ontario |
| | -- M. Fossiliferous limestone, Dorset, S.W.England |
| | -- N. Datolite prisms, Charcas, Mexico |
| | |
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