 | | 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 |  | | Report (volume) | | _ __ __ __ _ 2. Map of the western part of the northern peninsula of Michigan showing the Kiernan quadrangle...anomaly caused by the Fence River formation to outcrops of Hemlock formation and quartz-biotite schist...from Kiernan quadrangle and adjacent areas of northern Michigan_______ 8. Chemical analyses of metarhyolite...eastern Iron County, in the western part of the northern peninsula of Michigan. The area is underlain by...magnetite or martite, and in places oxidized to a red color. A major unconformity separates the Lmver Precambrian |  | | 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 |  | 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) | | Intermediate and 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...Craignurit-e and Allied Granophyre . . ,, 34. Section showing Loch Uisg Granophyre cutting folded Lavas...Loch Ba Ring-Dyke, . . . Microsections : Knock Granophyre and Locl1 Ba Felsite, Map showing Distribution |  | | 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 (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...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...the quarts diorite and Jurassic sedimentary and volcanic rocks whose structures can be traced almost to |  | | Journal (article/letter/editorial) | | granites, ~ 2 800 m thick into which small stocks of red granite, genetically associated with economically...the Acid Phase of the Complex, (ii) the terminal volcanic phase of the Transvaal Supergroup, or (iii) representative...hills north of the Sterk river b e y o n d the northern boundary of the area studied. Further to the northwest...hills merge into a sandy undulating plain where outcrops of the felsic rocks are infrequent. Overlying...Stratiform granite Felspar porphyry Sterk river granophyre Granophyric granite Fine- to coarse-grained granite |  | | | | 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 | | | 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_ |  | | Journal (article/letter/editorial) | | triangle pits, blurry one-dimensional extending region, and micro-slabs. The fractures followed the [112]...of the mantle beneath São Tomé Island (Cameroon Volcanic Line) Impact of sulfide oxidation on continental...belonging to the Cameroon Volcanic Line (CVL), a 1600 km long alkaline volcanic chain that straddles continental...in light of the main volcanic cycles that we established: the Mizambú Volcanic Complex (CMZ: 6 -8 Ma)... the Ribeira Afonso Volcanic Complex (CRA: 2.5 - 5 Ma) and the São Tomé Volcanic Complex (CST: < 1.5 |
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