 | | Report (issue) | | Page 1 D U.S. Department of the Interior U.S. Geological Survey Geology of St. John, U.S. Virgin Islands...Rankin—GEOLOGY OF ST. JOHN, U.S. VIRGIN ISLANDS—U.S. Geological Survey Professional Paper 1631 U.S. GEOLOGICAL...Trunk Bay on the northern coast of St. John, U.S. Virgin Islands. Trunk Cay is located just to the left...Thatch Islands of the British Virgin Islands, and Mary Point, which is to the northeast on St. John.... U.S. Department of the Interior U.S. Geological Survey Geology of St. John, U.S. Virgin Islands By |  | | Report (issue) | | Evidence for Metallization on St. Thomas and St. John, U.S. Virgin Islands by R. E. Tucker, H. V. Alminas...preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic...the Virgin Islands and vicinity.................. 2 Figure 2. Geologic map of St. Thomas, U.S. Virgin...Virgin Islands............... 3 Figure 3. Geologic map of St. John, U.S. Virgin Islands...............map of St. Thomas, U.S. Virgin Islands........ 8 Figure 5. Sample locality map of St. John, U.S. Virgin |  | | Report (issue) | | U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY GEOLOGIC MAPS OF ST. JOHN, U.S. VIRGIN ISLANDS...preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the...purposes only and does not imply endorsement by the U.S. Government. 1997 DESCRIPTION OF MAP UNITS Dikes...Named for prominent dikes at Red Hook, Eastern St. Thomas quadrangle, where the dikes are intruded along... which is also exposed in Tortola, British Virgin Islands. 40Ar/39Ar plateau age on hornblende of 38 |  | | Journal (article/letter/editorial) | | The Geology of the Virgin Islands. 339 Fig. 5 shows a scries of parallel terminating cracks in an andesite...Mancora Tablazo. The Geology of the British Virgin Islands. By K. W. EAKLE, M . S C , F.G.S. (PLATE XXI... no geological account of the British J-*- Virgin Islands has ever appeared in a British journal, the...being P. T. Cleve (I),1 who visited most of the islands during an extended tour in the West Indies in 1868-9...description of the geology and petrology of the islands, as a preliminary guide to geologists who may be |  | | Journal (article/letter/editorial) | | of Spilites and Associated Rocks from St John, U.S. Virgin Islands ABSTRACT A continuous section of extrusive...core of about 2430 ft that was taken at St. John, Virgin Islands. This study is confined to the upper 1180...spilite is intruded by two amphibole porphyries, one albite-diabase, and oneandesine-diabase. This spilite...suggest that the parental magma of the spilites from St. John was altered due to a b u r i a l metamorphism...Geological Setting and Previous Work The island of St. John is located between the Caribbean Sea and the |  | | Report (volume) | | Mineralogy, and Geochronology of the U.S. Virgin IslandS" U.S. GEOLOGICAL SURVEY BULLETIN 2057 AVAILABILITY...AND MAPS OF THE U.S. GEOLOGICAL SURVEY Instructions on ordering publications of the U.S. Geological Survey...catalog "New Publications of the U.S. Geological Survey." Prices of available U.S. Geological Survey publications...List." Publications that may be listed in various U.S. Geological Survey catalogs (see back inside cover)...writing to the National Technical Information Service, U.S. Department of Commerce, Springfield, VA 22161; please |  | | Journal (article/letter/editorial) | | usual in basaltic and felsic rocks, the presence of albite feldspar, together with a generally submarine 'geosynclinal'...a variety of different felsic rocks containing albite, and notes that keratophyres could originally have...low-grade greenschist mineralogical association of albite, chlorite, epidote and calcite. Ila. This metamorphism...basis of further study of spilites of St. John, Virgin Islands, concludes that 'Burial metamorphism could...(1937) of'the spilite reaction' whereby a pure albite was produced from anorthite in the presence of |  | | Report (chapter) | | E S E G M E N T S T U D I E D PUERTO RICO VIRGIN ISLANDS PETER HUMPHREY MATTSON Department of Earth...1. Puerto Rico Trench 2. Naranjito zone 3. Virgin Islands zone 4. Barranquitas zone 5. Ponce zone 6....650 653 655 658 659 660 Puerto Rico and the Virgin Islands lie near the east end of the Greater Antilles--a...very large volume of modern data available on the islands, which is synthesized in this article, makes Puerto...been tilted and faulted. The Naranjito (2), Virgin Islands (3), Barranquitas (4) and Ponce (5) zones are |  | | Journal (article/letter/editorial) | | occurrenceof wairakite in spilitic rocks from St. Thomas, Virgin Islands, is of specialinterest for severalreasons...consolidationof this spilite. The oldest rocks of St. Thomas are the keratophyres and spilites of the Water... Length of section 5 inches. flow at Nadir, St. Thomas. Later field work showedthat there wereprobably...ol Werurrro lnou Sr. Tnouas ,q.NpWnrn.lrr St. Thomas n (mean)1.502+ 001 ^f-d 2Y, .0015to .0025...toWerne.r T.c.sln 2. X-Rev Dlu Wairaki (Coombs) St. Thomas (200) dA dA 6.84 6.85 (2rr) 40 80 3.65 |  | | Journal (article/letter/editorial) | | primary minerals. The secondary minerals include albite, chlorite, prehnite, biotite, sphene, apatite,...10 mm across. They may be partly rimmed by clear albite, optically continuous with the partly kaolinized...minor prehnite is intergrown with the pumpellyite, albite and chlorite. In addition, pumpellyite may be associatedwith...consists mainly of carbonate with marginal clear albite, chlorite, pumpellyite, and rare prehnite. The...andesitic fragments and spilitic flows from the U.S. Virgin Islands and invoked an autometasomatic origin. Ilowever |  | | Journal (article/letter/editorial) | | Geology, University o f Miami, Coral Gables, Fla. {USA) and D.E. FISHER Rosenstiel School o f Marine and...Atmospheric Science, University o f Miami, Miami, Fla. (USA) Received September 18, 1975 Revised version received...measured on igneous rocks from islands of the Limestone Caribbees (St. Martin, St. Bartholomew, Antigua, and...data indicated that rocks on several of these islands are Eocene in age and among the oldest known in...in the arc. The oldest igneous activity on the islands studied is 35-40 m.y. Bifurcation of the Lesser |  | | Journal (article/letter/editorial) | | types of quartz keratophyre are leucocratic sodic albite-phyric volcanic.s, the former intermediate and...among igneous rocks (the same applies to albite diabase, albite granite, spilite, etc.) and it might be...system, such as quartz keratophyre, albite diabase, spilite, albite granite, etc., and are due to the traditional...traditional grouping of albite with potash feldspar as alkali feldspar instead of with plagioclase)....containing orthoclase, and soda keratophyre which has albite. Similarly, quartz keratophyre is the anchimetan~orphic |  | | Journal (article/letter/editorial) | | California 93106, USA Departmentof Oceanography, University of Maine, Walpole, Maine 04573, USA Abstract. La...Cr" m 03 Ld > / \ < ~ MARTINIQUE 0 ~ F.- A ST LUCIA 14~ U .,< ~b oc # VINCENT t~ .,J ...(Fig. 2). The plutonic rocks range from diorite to albite granite, but are largely plagiogranite. These plutonic...microdiorite to granodiorite porphyry and quartz-albite granophyre. Strong deuteric and hydrothermal alteration...abundant secondary chlorite, epidote, uralite, albite, and prehnite, giving these rocks a 'greenschist |  | | Journal (article/letter/editorial) | | 79 Proben von den Kalkstein-Karibeninseln Atigua, St. Martin und Desirade zeigt eine unterschiedlich starke...the predominantly island arc igneous suite CaO, Rb, St, Ba und Cu. Seltener ist eine Poeneitisierung zu...79 samples from the Limestone Caribbee islands of Antigua, St. Martin and Desirade show different degrees...of alteration are closely associated in these islands. Spilitisation leading to albitisation of plagioclase...provenant des Iles calcaires des Caraibes, Antigua, St. Martin et la D6sirade, montre une forte transformation |  | | Journal (article/letter/editorial) | | abundance in metadomains. Spilites from U.S. Virgin Islands also show evidence for REE mobility during...margins), volcanic arcs (converging margins), ocean islands (within plate oceanic) and continent (within plate...geochemical study of five islands groups (situated within an area of 60 km 2) in St. Andrew Strait, Papua...Basalts from Baluan Island are typical of ocean islands (i.e. possibly due to 'hot spot' activity) and...in the Cretaceous Water Island formation, U.S. Virgin Islands (Donnelly, 1966). The results confirm our |  | | Journal (article/letter/editorial) | | Formation, the basal volcanic complex in the Virgin Islands at the east end of the Greater Antilles, suggest...correlate with the Water Island Formation in the Virgin Islands (Donnelly, 1966)) 0168-9622/87/$03.50 0 1987... 1. Location of the Dominican Republic and Virgin Islands in the Greater Antilles. Martinique in the...seawater to assemblages containing chlorite, calcite, albite, epidote, pumpellyite and prehnite. The Water ...reaction with seawater to assemblages containing albite, epidote, calcite and chlorite. The abrupt increase |  | | Report (issue) | | Geologic Map of the Greater Antilles and the Virgin Islands By Frederic H. Wilson, Greta Orris, and Floyd...Report 2019–1036 2019 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior...DAVID BERNHARDT, Secretary U.S. Geological Survey James F. Reilly II, Director U.S. Geological Survey, Reston...purposes only and does not imply endorsement by the U.S. Government. Although this information product, for...geologic map of the Greater Antilles and the Virgin Islands: U.S. Geological Survey Open-File Report 2019–1036 |  | | Report (issue) | | appearance to the Water Island Formation of the U.S. Virgin Islands (Donnelly, 1966), except that in Puerto Rico...geologic map of Puerto Rico and 6 | adjacent islands: U. S. Geol. Survey Misc. Geol. Inv. Map 1-392...in the stratigraphy of northeastern Puerto Rico: U.S. Geological Survey Bull. 1372-G, 10 p. 10-'Briggs...-/urogeologic map of Puerto Rico H ^and adjacent islands: U. S. Geol. Survey Hydro. Inv. Atlas HA-197....hydrothermal events in Puerto Rico and the Virgin Islands: U. S. Geol . Survey Jour. Research. Donnelly |  | | Report (issue) | | Association of Petroleum Geologists, Tulsa, Oklahoma, USA 197] The printing of this volume is made possible...iiriassic(?)andiPaleozoic(?)iniG@ubaiwncscesseestce st cceter cos css cones eee ec ee ee 19 DISCUSSION See...ocsceseecceccsscncusceceeacts snasusduteer cote usa sesocte. stnatastnscte ecco eeeactem ees 83 Cornwall=Middléséx...in eastern Dominican Republic, Puerto Rico, and Virgin |S eye Cheer ners et Acc oh eerie a coca ER Ree...map of Jamaica, Hispanola, Puerto Rico, and Virgin Islands showing principal phenomena’ and localitiestmentioned |  | | Journal (article/letter/editorial) | | celadonite, chlorite, and sericite; 2. laumontite and albite; 3. prehnite; 4. pumpellyite; 5. epidote; 6. actinolite...to zeolites, prehnite, p u m p e l l y i t e , albite, a n d a v a r i e t y of o t h e r s e c o n d...Ca-feldspar and secondary albite; albitization is virtually complete up to the albite-plagioelase interface...dependent upon relic plagioelase composition. Secondary albite occurs also along fractures or crushed zones throughout...stage methods indicate t h a t the composition of albite is less than An 5 (Fig. 2). All of the albites |  | | Journal (article/letter/editorial) | | 66-96, 4 PLS. JANUARY 1963 GEOLOGY OF ST. BARTHOLOMEW, ST. MARTIN, AND ANGUILLA, LESSER ANTILLES BY...BY ROBERT A. CHRISTMAN ABSTRACT The islands of Saint Bartholomew and Saint Martin consist of andesitic...During the late Eocene and early Oligocene, these islands are believed to have been the sites of active volcanoes...faulted as a result of the volcanic activity and on St. Martin they were extensively metamorphosed. By the...and, during the Pliocene and Pleistocene, the islands were probably connected to form one large island |  | Shagam, R., Hargraves, R. B., Morgan, W. J., Houten, F. B. Van, Burk, C. A., Holland, H. D., Hollister, L. C. - Eds. (1972) Studies in Earth and Space Sciences. GSA Memoir 132. Geological Society of America doi:10.1130/mem132 | Report (issue) | | Copyright is not claimed on any material prepared by U.S. Government employees within the scope of their employment...Complex, Northern Greece .Jay Zimmerman, Jr. 225 St. Paul’s Rocks, Equatorial Atlantic: Petrogenesis...Subaerial Island-Arc Volcanism: An Example from the Virgin Islands.Thomas W. Donnelly Chaotic Sedimentation...Pyroxenes: A Review.G. Malcolm Brown Disordered Albite and Oligoclase from Veins in Metabasalt .Manuel...sights on the rank he ultimately attained in the U.S. Naval Reserves. In science, however, there are indications |  | | Report (issue) | | neighboring islands of Culebra and Vieques viewed from orbit by Gemini V in 1966, at the height of the U.S. Geological...Geochemistry of intrusive igneous rocks, St. Croix, U.S. Virgin Islands Edward G. Lidiak and Wayne T. Jolly...Miocene to the Recent in Puerto Rico and the Virgin Islands is associated with easterly transtensional...counterclockwise rotation of the Puerto Rico and Virgin Islands platform (Reid et al., 1991). Surrounding this...basins are separating the Puerto Rico-northern Virgin Islands arc terrane from adjacent arc terranes in Hispaniola |  | | Journal (article/letter/editorial) | | Petrology of the Igneous Rocks. - Vol. 1. London (Thomas Murby & Co.) 1961. JACOBSON, R. R. E., et al.:...metamorphic history of the surrounding continents and islands (i. e. "plate margins"). In this report, a detailed...island of Margarita, the largest of the Caribbean islands belonging to the Bepublic of Venezuela, is located...indicated by 1000 fathom contour (after HEss, 1966). Islands with Recent volcanic activity shown in black. Slip... MAnESCH, 1974 a) and possibly those of other islands to the west and northwest, a well-documented stratigraphic |  | | Journal (article/letter/editorial) | | Department of Geological Sciences, Brock University, St. Catherines, Ontario, Canada. • Union Miniere Center...the stratigraphic section, laumontite, analcime, albite, and chlorite dominate assemblages characteristic...measurement. Albite was determined on a universal stage using the curves of Slemmons (1963). Albite. As shown...albitized phenocrysts. A second population consists of albite, with compositions less than An 3 ± 2 (weight per...following minerals in order of abundance: chlorite, albite, prehnite, laumontite, analcime, and sphene. Although |
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