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Labradorite from
Ammonoosuc Volcanics, Grafton, Oxford County, Maine, USA


Classification
Species:Anorthite var: Labradorite
Formula:(Ca,Na)[Al(Al,Si)Si2O8]
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Labradorite data
Locality Data:Click here to view Ammonoosuc Volcanics, Grafton, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:220998
Long-form Identifier:1:3:220998:2
GUID (UUID V4):0013d2ba-6f06-4f8a-ab73-26da545af0d9
References
Reference Search (possible matching items)
Report (issue)
Geology of the Old Speck Mountain Quadrangle, Maine by Daniel Jeremy Milton Cambridge^ Massachusetts...Thickness ..................... ,/ Ananonoosuc volcanics .................. 20 20 General statement ...Sphene-flecked diorite from Maine. ............. A-l Gedrite from Oxford County, Maine. ............. B-l.......... Ik 2. Estimated modes of the Ammonoosuc volcanics. ...... 22 5. Estimated modes of the...the kyanite schist member of the. . . Ammonoosuc volcanics .. .............. 55 4. Composition of kyanite
Journal (article/letter/editorial)
Middle-grade zone High-grade zone Transition zone Ammonoosuc volcanics Distribution and general nature Amphibolite...rocks General statement Albee formation Ammonoosuc volcanics Lost Nation group Basic dikes and sills...glaciation. The region is drained chiefly by the Upper Ammonoosuc River which flows generally westward into the...and somewhat younger amphibolites of the Ammonoosuc volcanics constitute the oldest (upper Ordovician...in the northern part of New Hampshire within the county of Cob's, and includes the whole or portions of
Journal (article/letter/editorial)
features 1252 General lithologic features 1253 Ammonoosuc volcanics 1255 Partridge formation 1255 Clough quartzite...1262 verian magma series and Ammonoosuc 5. Photomicrographs 1263 volcanics 1272 5. Block diagram of folds... Measured sections of the Ammonoosuc oliverian magma series 1265 volcanics and Clough quartzite 1256...Approximate modes—Kinsman quartz 2. Approximate modes—Ammonoosuc volmonzonite 1267 canics, Partridge formation...belong to four formations. The Ordovician (?) Ammonoosuc volcanics, consisting of light-colored, fine-grained
Journal (article/letter/editorial)
....................................... Ammonoosuc volcanics.................................................................................. Moat volcanics.................................................quadrangle belong to two formations, the Ammonoosuc volcanics, of Ordovician (?) age, and the Littleton...geological map, PI. 3), of lower Devonian age. AMMONOOSUC VOLCANICS Amphibolites and biotite-hornblende schists...Franconia have been correlated with the Ammo­ noosuc volcanics, because of their lithology and the fact that
Journal (article/letter/editorial)
Gedrite-Cordierite-Gneiss from Southwestern New Hampshire, USA by JOHN C. SCHUMACHER1 AND PETER ROBINSON 2 1 (Received...gedrite-cordierite-gneisses of the Middle Ordovician Ammonoosuc Volcanics, and are composed of combinations of the...Petrology, VoL 28, Put 6, pp. 1033- 1073, 1987] © Oxford Ummnty Prc» 1987 Downloaded from http://petrology...s that is part of the Middle Ordovician Ammonoosuc Volcanics. Samples used in this study were collected...the Keene gneiss dome, southwestern New Hampshire, USA (Fig. 1). The distinctive gedrite-cordierite-gneisses
Report (issue)
GEOLOGIC RADON POTENTIAL OF EPA REGION 1 Connecticut Maine Massachusetts New Hampshire Rhode Island Vermont...GEOLOGIC RADON POTENTIAL OF EPA REGION 1 Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and...Preliminary Geologic Radon Potential Assessment of Maine Linda C.S. Gundersen andR. Randall Schumann 83...aerial radioactivity, and indoor radon data by county. Because of constraints on the scales of maps presented...The reports are available in county formats and State summaries. The county reports typically contain both
Journal (article/letter/editorial)
The oldest formation is Ordovician (?) Ammonoosuc volcanics consisting chiefly of fine-grained biotite...biotite gneiss and amphibolite. Above the Ammonoosuc volcanics is a gneiss correlated with the Ordovician...probably Mississippian and includes the Moat volcanics, the syenite of Cherry Mountain, and the Conway...the amphibolite. It is younger than the Ammonoosuc volcanics of Ordovician age, which it cuts, but older...rhyolite is presumably associated with the Moat volcanics, which belongs to the White Mountain magma series
Report (issue)
Formation are tentatively correlated with the Ammonoosuc Volcanics and the Monson-Fourmile Gneisses of the...northwest Maine (Harwood and Berry, 1967) and a lateral correlation with the Ammonoosuc Volcanics in the...establishing possible lithic correlation with the Ammonoosuc Volcanics and the Monson or Fourmile Gneiss in the...considered to be approximately equivalent to the Ammonoosuc Volcanics of the Bronson Hill anticlinorium. The homogeneous...figure 10. We correlate this unit with the Ammonoosuc Volcanics along the Bronson Hill anticlinorium. These
Report (volume)
Formation and a Dike Cutting the Standing Pond Volcanics, Southeastern Vermont John N. Aleinikoff and Paul...Elements in the Vicinity of Mount Ascutney, Windsor County, Vermont Leslie J. Cox CHAPTER 0 Carbonate-Hosted...and Heavy-Mineral Concentrates from the Orange County Copper District, East-Central Vermont John F. Slack...northeast in northern New Hampshire and west-central Maine. S.H.B. Clark describes the sediment-hosted, stratabound...t"' 45°00' ! - = - - - OGDENSBURG- ~/" / I \MAINE 44 ooo·lrun:r:;;rc~A----+--'----*="=::--:-;='-----1
Report (issue)
interbedded with increasing amounts of intermediate volcanics of predominantly andesitic composition; in general...quadrangle, Massachusetts, substituting Ammonoosuc Volcanics (Billings, 1937) for most of the Dana Diorite...(1960) and 10 Robinson (1963). Although the Ammonoosuc amphibolites and gneisses are very similar to...brownish garnet quartzites which occur in the Ammonoosuc. Hence, these amphibolites and gneisses have...Quartz-hornblende-oligoclase gneiss. 68-52 Quartz-labradorite-hornblende gneiss. 55-79c Hornblende-andesine-quartz
Book (volume)
Mineralogy by Vandall T. King and Eugene E. Foord Maine Geological Survey DEPARTMENT OF CONSERVATION Walter...Resources Information, Maine Geological Survey Walter A. Anderson, State Geologist Maine Geological Survey...DEPARTMENT OF CONSERVATION 1994 Copyright ©1994 by the Maine Geological Survey, Department of Conservation. All...photograph: Fluorapatite, Pulsifer quarry, Auburn, Maine (2.2 cm specimen), Harvard Mineralogical Museum...Wendell E. Wilson, ©1985. The laws and policies of Maine and the United States prohibit discrimination in
Journal (article/letter/editorial)
The pre-Devonian rocks, constituted by the Ammonoosuc volcanics, the Clough formation, and the Fitch formation...Introduction 382 General lithologic features 384 Ammonoosuc volcanics 384 Clough formation 385 Fitch formation...descending order, are the Clough formation and Ammonoosuc volcanics. These formations can be traced almost without...of lower or middle Silurian age and the Ammonoosuc volcanics to be of probable upper Ordovician age....similar bodies of adjacent areas. AMMONOOSUC VOLCANICS The Ammonoosuc volcanics outcrop along a nearly continuous
Journal (issue)
some-· thing to crow about. The locality is Kern County, Calif. Apatite: This calcium phosphate is always...loose purple crystal from Mt. Apatite, Auburn, Maine; another was a flattened colorless crystal which...in America for autunite is the Ruggles Mine, of Grafton Center, N. H., where it occurs as gre~nish incrustations...Bluish crystals on white natrolite from San Benito County, Calif., is one of the many minerals that has made...crystals in matrix from Crab Tree Mt., Mitchell County, N. C., were also on display. Aquamarine crystals
Journal (article/letter/editorial)
Institute of Technology, Cambridge, Massachusetts 02139, USA Abstract. Equilibria between plagioclase, calcic...Amphibolites and calc-silicates from the Ammonoosuc and Post Pond Volcanics, New Hampshire and Vermont, and the...from the staurolite isograd come from the Ammonoosuc Volcanics on the north and west flank of the Mascoma...not at this grade the association hornblende+labradorite is stable. A dashed line labeled wi~h a (?) has...associated minerals in some schists from Vermont, USA and south Westland, New Zealand, with inferences
Report (issue)
COUNTRY.......... STATE CODE....... STATE............ COUNTY........... UNITED STATES 25 MASSACHUSETTS BERKSHIRE...COUNTRY.......... STATE CODE....... STATE............ COUNTY........... UNITED STATES 25 MASSACHUSETTS BERKSHIRE...COUNTRY.......... STATE CODE....... STATE............ COUNTY........... SAMPLE IDENTIFICATION RECORD NUMBER...COUNTRY.......... STATE CODE....... STATE............ COUNTY........... SAMPLE IDENTIFICATION RECORD NUMBER...CODE....... UNITED STATES 25 STATE............ COUNTY........... MASSACHUSETTS HANPOEN QUAD SCALE 1:
Report (issue)
_______________________ _ Geology of the pegmatite districts of Maine __ :. . _____ _ Metamorphic rocks _________________________...pegmatites ___________________ _ Pegmatites of the Grafton and Keene districts __ _ Sources of pegmatites...__________________ _ Maine ________________________________________ _ Androscoggin County ______________________...Cumberland County _______________________ _ LaChance mines _______________________ _ Oxford County ______...Descriptions of mines and prospects-Continued Maine-Continued Oxford County-Continued George Elliot mica mine ________________
Report (issue)
fossiliferous rocks in the Merrimack Synclinorium in Maine and the Bronson Hill Anticlinorium in New Hampshire...Rocks underlying the Merrimack Synclinorium in Maine range in age from Ordovician to Devonian and consist...Zone 12- 13) volcanic rocks and schists (Ammonoosuc Volcanics, Partridge Formation, Hawley Formation)...extrapolated the fault into the Casco Bay area of Maine. It was named the Wekepeke Fault in the Clinton...Lawrence that strike into Kittery, York, and Eliot, Maine. Hitchcock (1877, Plate XXIII, Fig. 98) included
Report (issue)
(Zp) extends into Massachusetts in the Webster-Oxford area (fig. 4) from eastern Connecticut and western...State bedrock map, trending northeast through Grafton towards Westborough, are on strike with the Plainfield...unit) "The Plainfield extends into the Webster-Oxford area of Massachusetts from eastern Connecticut...Weymouth Formation Group in the Eastport area, Maine, on the basis of around the Boston basin can be...Argillite were deposited in relatively shallow region, Maine, are also temporal equivalents. On the water but
Journal (article/letter/editorial)
determined optically and ranged from andesine to labradorite. Generally, all types of feldspar are influenced...Silurian Rochester and McKenzie Shales, Morgan County, West Virginia. Journal of Sedimentary Research...1988. Stratigraphy and geochemistry of the Ammonoosuc Volcanics, central Massachusetts and southwestern
Report (issue)
as the pioneer in the geology of west-central Maine, for his expertise on the mineralogy of pegmatites...paleontology: two on the Merrimack Synclinorium in Maine and three on the so-called Pennsylvanian basins...(prehnite-pumpellyite) metamorphism in Massachusetts and Maine, respectively, are the subjects of two of the...nickeliferous pyrrhotite deposits of southeastern Maine, gravity studies of the New Hampshire Plutonic Series...polymetamorphism in the Merrimack synclinorium of western Maine ....... Robert H. Moench and Robert E. Zartman
Report (issue)
Massachusetts ............................... Maine ....................................... California...southerly part of the city of Barre, Washington County, State of Vermont, and extending westerly about...miles to and including \Villiamstown. in Orange County. All granite quarried elsewhere may not legally...mills at West Pawlet, Poultnev, Fair Haven, and in Maine. Products: Roofing, flagging, flooring, etc. VERMONT...has been quarried in Vermont at Athens, Chester, Grafton, and Perkinsville since 1850. The uses to which
Report (volume)
Geology of the Attean Quadrangle, Somerset County, Maine By ARDEN L. ALBEE and EUGENE L. BOUDETTE With..._ Nature of the Taconic orogeny in west-central Maine _____________ _ Geomorphology _________________...profiles of the Attean quadrangle, Somerset County, Maine. 2. Bedrock geologic maps and section of the...__ 2. Generalized geologic map of west-central Maine, northern New Hampshire, and adjacent Quebec_______________... GEOLOGY OF THE ATTEAN QUADRANGLE, SOMERSET COUNTY, MAINE By ARDEN L. ALBEE and EuGENE L. BoUDETTE
Report (volume)
October 1936. Ky., February 1930. La., March 1931. Maine, September 1935. Md., April 1929. Mass., April... 5 in., inch or inches. Circ., Circular. Co., County or Company. Indus., Industrial. Inst., Institute...than Glenarm series and designated "greenstone volcanics" is stated to include a porphyritic amygdaloidal...Pre-Cambrian : Central southern Virginia (Mecklenburg County). F. B. Laney, 1917 (Va. Geol. Surv. Bull. 14,...Pleistocene : Southern South Carolina (Charleston County). E. Sloan, 190 (S. C. Geol. Surv. geognostic map
Report (issue)
quadrangle, Windham County, Connecticut. 3.--Geologic map of the Hampton quadrangle, Windham County, Connecticut...respectively with the Partridge Formation and Ammonoosuc Volcanics of middle(?) Ordovician age in New Hampshire...(Goldsmith, 1966). v r-i Fitch Fm. (Ifl8fl5)l/ Ammonoosuc Vole, """ o M O rt i-i (0 ? Monson Gn...Middletown Formation is correlated with the Ammonoosuc Volcanics of New Hampshire, of middle Ordovician age...The composition of the plagioclase varies from labradorite to almost pure albite. In the least altered
Book (edition)
Hawaiian Ridge Relation of Post-Batholithic Volcanics to Relation of Post-Batholithic Volcanic Fields...Fields to Strato- volcanoes Post-Batholithic Volcanics to Trenches clinoria Other Elements to Origin...commonest types of reports are those that de- county or a certain stratigraphic details can be fitted...embrace more than a large state, and some are of county size. Some are fairly elongate, and most all have...them. The Rocky Mountain front orogeny. The volcanics are Eocene, Oligocene, and in is a result
 
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