 | | Report (issue) | | Divisions, ~. Coastal Hills, ~. Interior Upland, 4. Northern Ridges and Valleys, 5. Rivers, 7. Lakes and Swamps...Mineral Descriptions, 43. Intermediate Rocks, 44. Granophyre, 45. Anorthosite in Gabbro, 47. Contact Metamorphism...The area is hilly with a minimum elevation above sea level of 60~ feet at Lake Superior and ~~3~ feet...feet in the Misquah Hills. Much of the northern part of the county is characterized by long narrow lakes...are shown on Figure 2. Although largely a hilly region, Cook County is not mountainous despite the use |  | | Journal (article/letter/editorial) | | Intrusions of Gabbro and Granophyre in the Snaefellsnaes, Western Iceland By B. G. J. UPTON and J. B...individual GEOL. MAG. VOL. XCVHI NO. 6 Vril Granophyre Agglomera-te Hot-spring deposits Drift Recent...defined veins of gabbro-pegmatite (labradorite and augite) up to 15 cms. wide are locally common. Inclusions...of calcic plagioclase (bytownite—labradorite), augite, serpentine pseudomorphs after olivine and small...the LysuskarS valley. The southern Gabbro and Granophyre, Western Iceland 491 part consists in the main |  | | Report (issue) | | VOLCAKIC ROCKS Triassic rocks Lover Jurassic volcanic rocks .Middle and Upper Jurassic sedimentary rocks...Stratigraphic relationships, rUnnmft Volcano area Recorded volcanic activity, ni«mna Volcano Alaska Volcano Cobbles...the core of the Alaakaa Pea* insula. Hyper sthene*augite andeaite and basaltic andeaite flow* inter* bedded...lavaa indicating that the hematite producing the red color of the glaaa may have received ita oxygea from...Juraasic aadesite and dacite tuffs, tuff breccias* volcanic conglomerates, and mud flows make up a aectioa |  | | Journal (article/letter/editorial) | | basicigneousrocksandalsoby Permian"red bed" sediments. On the outskirtsof the region someof the hills are formed...Permian in well cuttings from variousplacesin this region. The igneousrocksare Pre-Reagan (Upper Cambrian)...(youngest); Lugerr granophyre;Carlton granophyre;Davidson granophyre;SaddleMountain granophyre;Gabbro-anorthosite;...--The Meers quartzite is the oldestrock in the region. It is exposedin threesmalloutcrops,two of which...exposures have beenintrudedby gabbroand the third by granophyre,all three showingsomeevidenceof contactmetamorphism |  | Bailey, E. B., Clough, C. T., Wright, W. B., Richey, J. E., Wilson, G. V. (1924) Tertiary and Post-Tertiary Geology of Mull, Loch Aline, and Oban. Memoirs of the Geological Survey. Geological Survey of Great Britain | Report (issue) | | XVII. Three EarJy Felsites, . . . . • • . XVIII. Augite-Diorites, . • • • . XIX. Intermediate and Acid...Acid Cone-Sheets, • • • XX. Locl1 Uisg Granophyre a.nd Gabbro, • • • XXI. Early Basic Cone-Sheets, . . •...Differentiation, . . . . . XXXI. Glen Cannol Granophyre, . . :. XXXII. Ring-Dykes of Loch Ba, Beinn a'...Dolerite, . . . . . ,, 24. Map of Glas Bheinn Granophyre, Cnoc na Faoilinn, . ,., 25. Serial Sections...Microsections : Augite-Diorite, . . . . . . ,, 33. Microsections: Craignurit-e and Allied Granophyre . . ,, 34 |  | | Report (issue) | | Tertiary continental rift and evolution of the Red Sea in southwestern Saudi Arabia by D. L. Schmidt I/...FORMATION ROCKS............ 18 Rhyolites of the rift volcanic rocks................ Silica replacement of Baid........ 18 26 AGE AND K20 CONTENT OF THE RIFT VOLCANIC ROCKS.......... 29 STRUCTURE................................ 34 36 39 41 EVOLUTION OF THE RED SEA................................ 42 Early Tertiary...stage.............................. First-stage sea-floor spreading..................... Subsequent events |  | | | | the east to Polurrian on the \vest. The southern region is composed of a varied series of igneous and metamorphic...to the south of the Helford River. The southern region has been surveyed by Dr. Flett. It presents problems...and the history of the n1etan1orphism. The northern region has been surveyed by Mr. Hill. It consists...bornblende-schists, 122; micaschists, 123 ; Manaccan Granophyre, 124 ; Meneage Quartzite, 125; fossils, 126;...137 ; shearing, 138 ; cleavage, 139 ; principal outcrops, 140; contact metamorphism by Carnmenellis Granite |  | | Report (edition) | | the east to Polurrian on the \vest. The southern region is composed of a varied series of igneous and metamorphic...to the south of the Helford River. The southern region has been surveyed by Dr. Flett. It presents problems...and the history of the n1etan1orphism. The northern region has been surveyed by Mr. Hill. It consists...bornblende-schists, 122; micaschists, 123 ; Manaccan Granophyre, 124 ; Meneage Quartzite, 125; fossils, 126;...137 ; shearing, 138 ; cleavage, 139 ; principal outcrops, 140; contact metamorphism by Carnmenellis Granite |  | | Book | | and its surroundings, from the early deep-sea and volcanic episodes of the Ordovician Period, through...of Skiddaw Slate sediments . 81 8 Borrowdale Volcanic rocks (a) andesitic flow breccia, and (b) coarse...Society, so well known for his studies of the volcanic rocks of the /'strict which he summarized in two...Limited H. V. Dunnington and Associates Mobil North Sea Limited Home Oil (U.K.) Limited Robertson Research...DOWNTONIAN SILURIAN' TRIASSICs LUDLOW WENLOCK Granophyre; microgranite Diorite; dolerite; ultrabasic intrusions | | | Report (edition) | | the east to Polurrian on the west. The southern region is composed of a varied series of igneous and metamorphic...to the south of the Relford River. The southern. region has been surveyed by Dr. Flett. It presents problems...another and the history of the metamorphism. The northern region has been surveyed by Mr. Hill. It consists...hornblende-schists, 1 2 2 ; mica schists, 123 ; Manaccan Granophyre, 1 2 4 ; Meneage Quartzite, 1 2 5 ; fossils,...137 ; shearing, 138 ; cleavage, 1 39 ; principal outcrops, 1 4 0 ; contact metamorphism by Cammenellis Granite_ |
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