 | | Journal (article/letter/editorial) | | PETROGRAPHICAL COUNTY, PROVINCE MASS. I. OF ESSEX THE area of igneous rocks in Eastern Massachusetts, especially...especially in Essex county, has been, as the late Geo. H. Williams said, " more discussed than any other...pages are written. I have visited the region of Essex county several times and collected a large number of...of its chief features. The igneous rocks of Essex county extend along the coast from Lynn to the New...Basin, but this paper does not include them. In Essex county they form a long ridge "extending in a northeasterly |  | | Journal (article/letter/editorial) | | FAYALITE AT ROCKPORT, MASSACHUSETTS* Cn,lnrns Pa.racne, H arvard, U niv ersity, Cambri,dge, M assachusetts...of fayalite at four Iocalities on Cape Ann, Massachusetts, with a description of one of them which yielded...granite, older than and intruded by the dominant Rockport granite. Fayalite is not a mineral of common...fayalite known in the granite of Rockport on Cape Ann, Massachusetts,to the description of which the following...pages are devoted. The first to find fayalite at Rockport was Mr. J. H. Sears(1905), the Curator of the |  | | 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...reconnaissance map and structure section of Essex County, Mass.........................................map and structure section of southern part of Essex County, and adjoining parts of Suffolk and Middlesex |  | | Report (volume) | | BUL.L.ETIN 354 CHIEF COMMERCIAL GRANITES OF MASSACHUSETTS, NEW HAMPSHIRE AND RHODE ISLAND BY T. NELSON...granites and quarries............................ Massachusetts...............................................Descriptions of the granites and quarries Continued. Massachusetts Continued. Quincy....................................................................... 98 Rockport.......................................................................................... 126 Rockport porphyry .................................... |  | | Journal (article/letter/editorial) | | THE PETROGRAPHICAL PROVINCE MASS. IV. COUNTY, BASIC OF ESSEX DIKES By far the greater part of the...olivine, plagioclase, a little orthoclase, some magnetite, and rare apatite. Neither biotite nor titanite...were seen. 284 PETROGRAPHICAL PROUVINCE OF ESSEX COUNTY 285 The hornblende forms either stout prismatic...frequently occurs as a primary border about augite and magnetite, as in the hyperitic diorites. The pyroxene, which...KEMP,dikes near PETROGRAPHICAL PROVINCE OF ESSEX COUNTY 287 are all decidedly more acid than the usual |  | | Report (issue) | | = 6.0889 Z=4 X-ray Powder Pattern: Rockport, Massachusetts, USA. (ICDD 20-1139). 2.501 (100), 2.828...Augite, plagioclase, microcline, quartz, apatite, magnetite, ilmenite, spinel, hedenbergite, arfvedsonite...occurrences of relatively pure material are: in the USA, in the St. Peters Dome area, near Pikes Peak, El...Springs, Inyo Co., California; at Rockport, Essex Co., Massachusetts; from Monroe, Orange Co., New York; |  | | Report (volume) | | ___ Groton____________________________ Oriinge County __________________________ Topsham___________________________..._ Randolph ___________________________ Orleans County- _______________________ Derby Barton _ _________...granite and finished product Continued. Washington County _____________________ 121 Barre and Williamstown________________...______ Windham County ___. .________ ± ________ Dummerston___ ____ ____________ Windsor County __._.____________________...granite and finished product___'.___ 164 Carroll County ___________ ______________ 164 Con way ______ |  | Isa, J., Kohl, I.E., Liu, M.-C., Wasson, J.T., Young, E.D., McKeegan, K.D. (2017) Quantification of oxygen isotope SIMS matrix effects in olivine samples: Correlation with sputter rate. Chemical Geology, 458. 14-21 doi:10.1016/j.chemgeo.2017.03.020 | Journal (article/letter/editorial) | | fluorination analysis. Several samples (Day Book dunite, Rockport, and those from the Skaergaard intrusion) were...compositions between San Carlos (Fa9) and the Rockport CE end-member (Fa97). All samples are close...elements other than Mg, Fe, Si and O. Only the Rockport sample has an appreciable tephroite component...the samples except “Day Book dunite” T and “Rockport”. For example, analyses of olivine EG 5108 Skaergaard...suitable to calibrate matrix effects. For the Rockport olivine, a nearly pure fayalite end-member, multiple |  | | Report (volume) | | Geology of Selected Quadrangles In Massachusetts GEOLOGICAL SURVEY This volume was printed as separate...quadrangle, Worcester and Franklin Counties, Massachusetts, by Donald F. Eschman. (D) Geology of the Taunton...quadrangle, Bristol and Plymouth Counties, Massachusetts, by Joseph H. Hartshorn. o ; Bedrock Geology...Vicinity Massachusetts > w By PRIESTLEY TOULMIN 3d GEOLOGY OF SELECTED QUADRANGLES IN MASSACHUSETTS ~s -GEOLOGICAL...1163-A Prepared in cooperation with the i Massachusetts Department of Public Works « UNITED STATES |  | | Report (issue) | | Be3:48 Si3:02 O12 S: (3) Bartlett, New Hampshire, USA; by electron microprobe, BeO calculated from stoichiometry...contact metamorphism, skarns, and Association: Magnetite, garnet, °uorite (skarn); albite, cassiterite...Distribution: In the USA, at Rockport and Gloucester, Essex Co., Massachusetts; on Moat Mountain, Conway...Haven, Connecticut, USA. Type Material: Harvard University, Cambridge, Massachusetts, 85384; National Museum...Museum of Natural History, Washington, D.C., USA, 124353; The Natural History Museum, London, England |  | | Report (issue) | | BEDROCK GEOLOGIC MAP OF OHE IPSWICH QUADRANGLE, MASSACHUSETTS 8 10- by William H. Dennen 11 1975 12 13... BEDROCK GEOLOGY OF THE IPSWICH QUADRANGLE, MASSACHUSETTS Introduction Rocks of the Ipswich quadrangle...quadrangle is situated on the northeastern 19 20- Massachusetts coast within the Seaboard Lowland section of...-fA9 maters on Fifteen Mile Hill in the Town of Essex to 21 -11 maters under the salt marsh at Six Goose...quadrangle are completely tidal; the 6 Ipswich and Essex Rivers are tidal inland to "falls" above which they |  | | 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) | | 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. |  | | Report (issue) | | Al0:08 )§=8:00 O22 (OH)1:64 : (2) Rockport, Essex Co., Massachusetts, USA; 3+ corresponds to (Fe2+ 6:63 Mn0:30...blueschist facies metaquartzites. Association: Magnetite, hematite, hedenbergite, riebeckite, fayalite...From around Michigamme, Marquette Co., Michigan, USA. In Canada, in the Labrador City area, Labrador, |  | | Report (issue) | | thalenite, euxenite, allanite, zircon, biotite, magnetite. Distribution: Widespread, but in small amounts...Ambatofotsikely, Ranomafana, Fiadanana, and elsewhere. In the USA, from the Baringer Hill pegmatite, 26 km west of...Anderson Co., South Carolina; at Rockport, Cape Ann, Essex Co., Massachusetts. At Madawaska, Ontario, Canada |  | | Journal (article/letter/editorial) | | Christianiaregion of southern Norway, and in Essex County,Mass. The compositionof some of the phases of...orthoclase and bluishgreen amphibole, and some magnetite, mica, fluorite, and zircon. V. Sodalite-nepheline...sand in a pegmatitedike in hornblendegranite at Rockport, Mass.6 In the latter place, as describedby Penfield...Rockportgranite is a phase of the alkali-richrock of Essex County.7 It is also found in cavitiesin the lava of...bluish- green arfvedsonite. The black mineral is magnetite,and the colorlesscrystalis apatite. normal conuitions |  | | Journal (article/letter/editorial) | | is a dark, banded tactite composed chiefly of magnetite, fluorite, chlorite, and diopside. The most coarsely...known occurrence is West Cheyenne Caiion, El Paso County, Colorado. Genthelvite is isometric, tetrahedral...tactite is a black to greenish, massively bedded magnetite-andradite rock which was formed through the replacement...rock is a garnetpoor, magnetite-fluorite tactite in which layers of magnetite alternate with layers composed...stained with manganese oxide; gray areas are magnetite; grayish, irregular podJike areas are helvite; |  | | Journal (article/letter/editorial) | | 09:35 10 October 2014 Helen Hunt Falls, El Paso County, Colorado O wing to its diverse paragenesis and...zircon crystals from Helen Hunt Falls, El Paso County, Colorado. Dave Bunk specimen, Jeff Scovil photo...quartz specimen from Helen Hunt Falls, El Paso County, Colorado. Dave Bunk specimen, John Smolski photo...Kennebec County (King and Foord 1994). Zircon crystals to 2.5 cm occur in titaniferous magnetite ore at...Mineville, Essex County, and crystallized specimens have been collected at Deer Hill, Orange County, and at |  | | Journal (article/letter/editorial) | | Samplesfor study included "ferrifayalite"from Qianan County, China, as well as'ferrifayalites"from the more...three "ferrifayalite" samples and a standard of Rockport fayalite (Palache,1950)were each ground under...then finely ground again under acetone,and any magnetite present was removed with a hand magnet (a necessaryprocedure...are apparently deficient in iron (compared to Rockport fayalite), due to the presenceof vacanciesreplacing...seen:"normal" fayalite (Rockport fayalite),and "ferrifayalite"(Qianan County "ferrifayalite", Mourne |  | | Journal (article/letter/editorial) | | feldspar group. THE MINERALS OF ROCKPORT. I{. E. MCKINSTRY MASSACHUSETTS Cambrid,ge, Mass. More than...was called to the unusua, mineral occurrences at Rockport, on Cape Ann, by J. P. Cooke's description of...being the type locality for these species, the Rockport quarries have afforded an interesting list of...pegmatite masses. Location und, Present Condition.-Rockport is best reaehed via the Boston and Maine R. R...white quartz and granular black mica. Danalite. Rockport is the type locality for this mineral, which, |  | | Journal (article/letter/editorial) | | mineral assemblage in the BIF comprises grunerite, magnetite/martite/ goethite and quartz. Relict carbonate...grunerite also occur within intergranular space of magnetite/martite. Grunerite needles/accicules show higher...adjacent magnetite/martite in iron mesoband. Some grunerite lamellae sinter into micron size magnetite platelets...from BIFs, of Western Australia, Nigeria, France, USA and Quebec. The protolith of this BIF is considered...grunerite, euhedral magnetite and recrystalized quartz were developed. Magnetite was grown at the expense |  | | Report (issue) | | VARIEGATED MARBLE SOUTHEAST OF CALERA, SHELBY COUNTY, ALABAMA. By CHARLES BUTTS. About 3£ miles a little... SUPPLEMENTARY NOTES ON THE COMMERCIAL GRANITES OF MASSACHUSETTS. By T. NELSON DALE. INTRODUCTION. The granites...granites and granite quarries of Milford, Quincy, Rockport, and Becket, Mass., were described in a former..."granites" here described, as well as the others of Massachusetts described in Bulletin 354, are commercially...TS H A M P S ! RHODE ISLAKD MAP OF MASSACHUSETTS, SHOWING GRANITE-QUARRYING CENTERS. NOTES |  | | Journal (article/letter/editorial) | | it has been found most commonly associatedare magnetite, quartz, bluegreen hornblende, hedenbergite or...of Toodyay, a very similar grunerite in banded magnetite-grunerite quartzite is also found occasionally...artzand in cummingtonitic grunerite associatedwith magnetite, garnet (almandine),and a strongly pleochroic...ironstone (meta-jaspilites) consist of banded magnetite-grunerite quartzites containing layers locally...olive-greencrystals. A -/1 B Frc. 3. Grunerite in banded magnetite grunerite quartzite, Meier's Find, Western Australia |  | | Book | | Nephelite-Cancrinite-Syenite 31. Essexite Maine Massachusetts Dacite-Quartz-Diorite Series: Colorado Minnesota...Diabase New Jersey VIII. 38. 48. Diabase Massachusetts Olivine-Augite-Hypersthene Gabbro 49. 50. ...Crystalline Limestones Vermont Dolomite-Marble Massachusetts Pink Marble Georgia IV. Ophicalcite, Serpentine...Oolitic Iron Gneisses and Crystalline Schists Massachusetts Hornblende-Gneiss New York 122. 123. 86. 87... 1. Glasses Scoria Near Black Rock, Millard County, Utah. O. E. Meinzer. Ref. : MACROSCOPIC MICROSCOPIC |  | | Journal (article/letter/editorial) | | pages 1252–1260, 2001 Ferroanthophyllite in Rockport grunerite: A transmission electron microscopy...twinned, near end-member grunerite from Rockport, Massachusetts. A small percentage of Pnma ferroanthophyllite...replacement of fayalite in granite from Rockport, Massachusetts, is a case in point. It was described as...However, we did not find protoamphibole in the Rockport sample. For comparison, we also studied a sample...produces twinned crystals 1252 BOZHILOV AND EVANS: ROCKPORT GRUNERITE (Fig. 1b). Starting with the C2/m amphibole |
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Rockport, Essex County, Massachusetts, USA