 | | Journal (article/letter/editorial) | | mineralogy of the aureole of the Nahant Gabbro at East Point, Nahant, Mass., USA P. K. VERMA Department of...The Lower Cambrian Weymouth Formation at Nahant, Massachusetts, consisting of interbedded pelitic and calcareous...calcareous rocks, was intruded by the Nahant Gabbro. The predominant metapelitic mineral assemblage of...physicochemical conditions of the formation of the Nahant hornfelses,the ferric mole fractions of coexisting...of Boston. East Point, the easternmost part of Nahant, consists of the metasedimentary rocks of the Weymouth |  | | Journal (article/letter/editorial) | | THE PETROGRAPHICAL PROVINCE OF ESSEX COUNTY, MASS. II term essexite was first introduced by Sears Essexite...alkali, and especially a soda-rich, magma. In Essex county they are confined to the immediate vicinity...prominent. Specimens from one locality 'SEARS, Bull. Essex Inst. Vol., XXIII, 1891. Elem. d. Gesteinslehre...through the mass in PETROGRAPHICAL PROVINVCE OF ESSEX COUNTY 55 a highly irregular grains and prisms, and...Fe2O3 -FeO -MnO -MgO --- CaO -- PROVINCE OF ESSEX COUNTY 47-94 2.92 0.20 1794 1744 2.56 7.56 trace |  | | Report (volume) | | 704 GEOLOGY OF THE IGNEOUS ROCKS OF ESSEX COUNTY, MASSACHUSETTS BY CHARLES H. CLAPP WASHINGTON GOVERNMENT....... 9 9 9 10 11 11 11 15 j ( Geology of Essex County.................................................. 26; . . 3 4 CONTENTS. Geology of Essex County Continued. Igneous rocks Continued. Subjacent........................... Gabbro and diabase at Nahant............................. Lithologic character........................... Diabase and gabbro of Nahant........................... 100 100 Felsic dikes |  | | Report (issue) | | Geology of Massachusetts E. Stratigraphy of the Milford-Dedharn Zone, Eastern Massachusetts: An Avalonian... Stratigraphy of the Nashoba Zone, Eastern Massachusetts: An Enigmatic Terrane G. Stratigraphy of the...Belt, Central Massachusetts H. Structural and Metamorphic History of Eastern Massachusetts I. Intrusive...Intrusive Rocks of Eastern Massachusetts J. Radiometric Ages of Rocks in Massachusetts L.S. GEOLOGICAL SURVEY...PROFESSIONAL PAPER 1366-E-J The Bedrock Geology of Massachusetts NORMAN L. HATCH, JR., Editor E. Stratigraphy |  | | Journal (article/letter/editorial) | | (v)hornblende-pyroxene- composition plots on the garnet-anorthite join and thus corroborates 1the textural evidence...garnet (-hematite). reaction epidote = garnet + anorthite Application of the phase rule to the scapoL:~te-...1Lhegarnetcomponents: SiO2, AlcOa, FeeOa, FeO, MgO, anorthite tie-line and nearer to the epidote comand CaO...rock. There is, however, a crossing of garnet-anorthite and sence of CI in scapolite, hornblende and apatite...iron in the fer- non-consideration of Cl, both anorthite and romagne:~,;fian phases and their coexistence |  | | Report (volume) | | OTIS SMITH, Director Bulletin 597 GEOLOGY OF MASSACHUSETTS AND RHODE ISLAND BY B. K. EMERSON WASHINGTON....................................... Worcester County, Mass....................................... Westboro...member........................... Northeastern Massachusetts..................................... General..................................... Western Massachusetts...............................................district............................. Eastern Massachusetts............................................ |  | | Report (issue) | | Radlometrlc Age Data Bank (RADB) of Rocks from Massachusetts by Robert E. Zartman and Richard F. Marvin...Radlometrlc Age Data Bank (RADB) of Rocks from Massachusetts Robert E. Zartman and Richard F. Marvln This...contains the records of radlometrlc ages for Massachusetts from the Radlometrlc Age Data Bank of the U...portrayed on a new bedrock geologic map of Massachusetts (Zen, 1983). The compilation Is believed to...they appear on the Bedrock Geologic Map of Massachusetts (Zen, 1983). Steiger, R. H., and Jager, E. |  | | Book | | MASSACHUSETTS MINERALAND FOSSIL LOCALITIES Compiled by Peter P. Gleba 'I!~·· . \. i r,'"--""'4' I...publication. Peter P. Gleba December 2008 Quincy, Massachusetts Member Boston Mineral Club Reprinted by permission...is some of the most valuable real estate in Massachusetts. Calculating it another way, [Peter Gleba] said...is some of the most valuable real estate in Massachusetts. It has access, it has convenience, it has exposure...window of his car as he passed west of the Massachusetts state lottery offices and saw a spreading rust |  | | Report (issue) | | Geology and Geophysics Boston College Weston, Massachusetts 02167 Geoffrey W. Smith Department of Geological...portion of the Boston Bay Group at Nantasket, Massachusetts. Brunton compass is for scale and also points...Mattapan Volcanic Complex, greater Boston, Massachusetts . 85 Margaret D. Thompson and O. Don Hermes...valon Boston terrane, Massachusetts . 133 A valon zones, eastern Massachusetts Martin E. Ross iii ...H., 1984, Cambrian rocks of East Point, Nahant, Massachusetts, in Hanson, L. S., ed.. Geology of the coastal |  | | Journal (volume) | | H. B. Kiimmel The Petrographical Province of Essex County, Mass. II. Henry - S. Washington ----------------... - --- The Distribution of Loess II. of Essex County, Mass. III. Henry 105 Fossils. B. Granitic...Edgar E. Teller The Petrographical Province of Essex County, S. Mass. Reviews : 247 261 272 Henry...VOLUME v VII PAGE Petrographical Province of Essex County, Mass. Henry S. Washington sion and Conclusions...Nipissing and Temiscaming Map Reviews : and County of Pontiac, Quebec, by Alfred Ernest Barlow (F |  | | Report (issue) | | we have for the calculation of the amount of anorthite modal or normative from the analysis. Similarly...cases the salie lime, and therefore the normative anorthite, will be too high and the classilicatory position...be no grads based on hypersthene. Again, with anorthite present, grads characterized by acmite can not...feldspars and lunads and the liino in tlie normative anorthite only CaO'. The latter is equal to the difference...Na2O in albite. t=the molecules of anorthite, or of CaO in anorthite (CaO')u the molecules of leucite, |  | | Book | | illustrations in colour and black and white gy) COUNTY LIBRARY | anioyn ofthe In 1 titute of Civil...rocks. The Salisbury Crag sill in Edinburgh and the Nahant sill in ABOVE Hot spring, Yellowstone National...cone intriguing names laccolith and lopolith Massachusetts are both composed of gabbro, while the Shonkin...Pre-Cambrian, and is at least 1000 million years old. The Nahant sill is about 450 million years old, and the Great... aluminium, silicon and oxygen are present); anorthite (CaAISi,O, — calcium (Ca) is present); and celsian |  | | Report (issue) | | Silurian stratigraphy of northeastern Aroostook County, Maine 1 . David C. Roy and Ely Mencher Discussion:...Silurian stratigraphy of northeastern Aroostook County, Maine... Louis Pavlides Lower Devonian Seboomook...Shride Pre-Silurian stratigraphy of northeastern Massachusetts .Kenneth G. Bell and Donald C. Alvord Stratigraphic...Wachusett-Marlborough Tunnel, east-central Massachusetts .James W. Skehan. S.J.. and A. Adel Abu-moustafa...stratigraphy in the Brimfield area, Connecticut and Massachusetts .John D. Peper and M. H. Pease, Jr. Pre-Silurian |  | | Book (volume) | | beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: area ridges, slopes, stream beds...Guide for Rock Hounds in the United States CUSTER COUNTY AREA: The November Mine, 1.2 mi. SE of the Needles...of rd. a few yds., outcropRose Quartz. DOUGLAS COUNTY CORSICA, S on US 281 to Armour, area rd. cuts, |  | | Report (volume) | | .......................................... Massachusetts...............:...............................See Bauxite and Halloysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities : Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20 S., R. 7 E.;...; Jefferson County, at Ely ton; Lee County, at Chewacla lime works"; St. Clair County, at Greensport; |  | | Report (issue) | | (Oligoclase) (Andesine) (Labradorite) (Bytownite) (Anorthite) Quartz Cristobalite Opal Pollucite Nephelite...prospects in the lower Ludlow lignites. Harding County: 1. Abemathyite has been identified as a component...Soluble In hydrochloric acid, yielding Custer County: 1. Allanite has been reported to occur as small...the Needles area. Runner (7) p 453. Pennington County: 1. Allanite occurs as microscopic inclusions in...H2O0.05 Insol. 1.12 Total 100.34± Occur. Custer County: 1. A greenish-black nodule of alluaudite 1 foot |  | | Report (issue) | | so-called Pennsylvanian basins of southeastern Massachusetts. Three papers deal with the geology of alkali...alkali plutonic-volcanic areas in Massachusetts and New Hampshire. High-grade and low-grade (prehnite-pumpellyite)...(prehnite-pumpellyite) metamorphism in Massachusetts and Maine, respectively, are the subjects of two of the papers...and the geology of the Ayer Granodiorite of Massachusetts. JOHN R,. GRIFELN STUDIES IN NEW ENGLAND...Brownlow V1 Vil iX Part I. Geology of eastern Massachusetts INaTOROVGNNE TON “5. B bo 8 OR Bo ee ek 5 ee |  | | Book (volume) | | ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE...nodules⎯Pyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS, area countywide exposures of blue clay...HIGHLAND COUNTY SINKING SPRING, area ore deposit (most important in Ohio) ⎯Hematite. HOCKING COUNTY AREA |  | | Report (volume) | | anonymous papers, placed at the end of Part I Co. county cos. · counties CORPORATE AUTHORS. Am G American...Congress . Mass H R Massachusetts, House of Representatives Mass St Bd Educ Massachusetts State Board of Education...Maryland,Harpers Ferry quadrangle: Keith, 94 Massachusetts, Holyoke quadrangle: Emerson, 98a Michigan... 09m Maryland, Ann Arundel Co.: Troost, 21 Massachusetts, Nantucket Island: Goldsmith, 79a New Jersey...Williston, 13a Manitoba, Cedar Lake: Tyrrell, 91a Massachusetts, Plainville, vertebrate footprints: Woodworth |  | | Report (volume) | | Arizona. II. Massive structure in diorite, Sliasta County, California.........:. III. Rhombohedral jointing... Thin sections of siliceous oolite from Center County, Pennsylvania, as seen under a microscope: A, in...XXXIX. Thin sections.of kiinberlitefrom Elliott County, Kentucky, as seen under a microscope............ 12 PREFACE. Harvard University, Cambridge, Massachusetts; 4 by Mr. George Otis Smith, of the United States...1ULLETIN NO. 150 MASSIVE STRUCTURE IN DIORITE, SHASTA COUNTY, CALIFORNIA. PLi II DILLER.] STRUCTURAL FEATURES |  | | Book (volume) | | ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE...nodules⎯Pyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS, area countywide exposures of blue clay...HIGHLAND COUNTY SINKING SPRING, area ore deposit (most important in Ohio) ⎯Hematite. HOCKING COUNTY AREA |  | | Report (issue) | | 201-209 (1979). Probe analyses (3) from gabbro, Nahant, Mass, (hornblende). AMPHIBOLE. Vielzeuf, Bull...201-209 (1979). Probe analyses (3) from gabbro, Nahant, Mass. BIOTITE. Vetrin, Miner. Paragenezisy Miner...201-209 (1979). Probe analyses (6) from gabbro, Nahant, Mass. CHLORITE. Weiss, (Conf. Clay Mineral. Petrol...201-209 (1979). Probe analyses (7) from 90 gabbro, Nahant, Mass. EPIDOTE. Zin'kov and Petrachenko, (Geol...201-209 (1979). Probe analyses (7) from gaDbro, Nahant, Mass. (Gr-Anj. tiAKiMET. Vielzeuf, bull. Mineral |  | | Report (issue) | | weighed have for the calculation of the runoun t of anorthite- as li1ne. But as manganese oxalate is slightly...phosphorus oxides, or by the presence in abun~lance of anorthite or nephelite, which will be indicated by correspondingly...by no 1neans suffici(mt to forn1 enough of the anorthite can not be ascribed to tho nondetormination of...the fact that the rock is very salic, so that anorthite is abundant and the mafic 1ninerals present in...properly classified in the fore the norn1ative anorthite, ·will be too high and thB quantitative system |  | | Report (volume) | | of Kentucky Geol. Survey County Rept. - Kentucky Geological Survey County Report. University of Kentucky...Analysts. Houston, Tex. Los Angeles County Mus. Contr. Sci. - Los Angeles County Museum Contributions in Science...Science. Los Angeles County Museum of Natural History. Los Angeles, Calif. Los Angeles County Mus. Nat. History...History Quart.- Los Angeles County Museum of Natural History Quarterly. Los Angeles, Calif. Louisiana Water...Dartmouth, Nova Scotia, Canada. Maryland Geol. Survey County Geol. Map Geologic Map. Baltimore, Md. Maryland |  | | Book | | instance has been very thoroughly at East Point, Nahant (83) baked and indurated by the heat of the dikes...sodium, or soda " " " Albite (9-10), feldspar. " Anorthite (15), " " calcium or lime " , feldspar. ...62 24 Andesite, 58 27 Labradorite, 53 Anorthite, 43 30 37 K2 O Na2 O CaO 17 Total. 100...the most abundant rocks in Diorite. Eastern Massachusetts it presents, however, ; distinct or interesting...examine a chart of any part of our coast, such as Massachusetts Bay, on which the nature of the bottom is indicated |
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