 | | Report (issue) | | from the roadlog of Thompson (1972). In the Orange County copper district, the stops and descriptions in...CRETACEOUS AND JURASSIC Metagabbro Mainly felsic gneiss (metamorphosed granite) LB NP RO WS SP Kl RT ...Oliverian quartzo-feldspathic gneiss of the Mascoma Dome. This meta-igneous gneiss has been dated by Rb-Sr...approximately 440 to 450 Ma old (Naylor, 1969). The gneiss apparently intrudes Middle Ordovician (450 Ma)...clearly crosscut the Acadian foliation of the Mascoma gneiss and are undeformed, thus indicating a post-Middle |  | | Book | | ����������������� 157 46. Big Falls Hornblende Gneiss �����������������������������������������������������������...���������������������������� 224 67. Jim Falls Gneiss and Granite ���������������������������������...permitted. Many entries in this book are in city parks, county parks, state forests, state parks, federal lands...to go to a crusher. If you take your wagon to a roadcut, you are collecting too many rocks. This can also...not question why you are so intently studying a roadcut. Dehydration and hunger can make you and your companions |  | | Report (volume) | | Western Part of the Morrison Quadrangle Jefferson County, Colorado GEOLOGICAL SURVEY BULLETIN 1251-E...Western Part of the Morrison Quadrangle Jefferson County, Colorado By D. J. GABLE CONTRIBUTIONS TO GENERAL...____ Biotite gneiss.____________________________________________ Garnetiferous biotite gneiss _ _____ _..._ ___ ______ _ Hornblende gneiss and amphibolite._________________________ Cordierite-bearing biotite...Microcline-quartz-plagioclase-biotite gneiss.__________________ Calcium-silicate gneiss.____________________________________ |  | | Report (issue) | | ____________________ _____ 10 10 Wilson Creek Gneiss ------------------------Megascopic features _____________________...Petrography ---------------------------Layered gneiss __________________________ 63 64 Age -------...dica schist, mica gneiss, and amphibolite ____ Biotite-muscovite schist and gneiss _____ _ Amphibolite...schist ______ _ 12 12 12 12 17 Quartz monzonite gneiss ----------- -----Phyllonite and blastomylonite... and age -------------------------Blowing Rock Gneiss __ ______________________ Brown Mountain Granite |  | | Report (issue) | | been dated at about 1726 Ma. Quartzo-feldspathic gneiss dated at about 1697 Ma in the central Front Range...by Knoper and Condie (1987) Migmatitic biotite gneiss and schist, chiefly assigned to the "Black Canyon...right. 1.9 Outcrop of amphibolite and felsic gneiss cut by pegmatite and fine-grained leucocratic dikes...additive to cattle feed, and for road metal. 8.9 Roadcut in Proterozoic granite mapped as Pikes Peak by...Middle Proterozoic. 10.7 Monarch Ski area 11.8 Roadcut in Proterozoic granite, much shattered and discolored |  | | Book (edition) | | backroads and often come across a quarry or a roadcut, stop and investigate it, and bring back some colourful...present additional problems. The famous Hi ghway 62 roadcut north of Bancroft is now closed to collectors because...to get at mineral samples, they undermined the roadcut and it became a safety hazard. If you choose to...Road, tum right and drive 22.2 km to the roadcut. The roadcut is located on top of a small hill, just...actinolite crystals; albite, biotite, white calcite The roadcut contains a small lens of calcium-silicate meta-sediments |  | | 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: |  | Zhang, Zeming, Xiao, Yilin, Liu, Fulai, Liou, J.G., Hoefs, Jochen (2005) Petrogenesis of UHP metamorphic rocks from Qinglongshan, southern Sulu, east-central China. Lithos, 81 (1) 189-207 doi:10.1016/j.lithos.2004.10.002 | Journal (article/letter/editorial) | | and quartzite are exposed in the Qinglongshan roadcut, southern Sulu orogenic belt of eastern central...belt, showing the location of the Qinglongshan roadcut (Fig. 2). chemistry, several important conclusions...(ii) minerals from UHP eclogite, quartzite and gneiss have unusual negative d 18O values (as low as to...investigate the petrogenesis of UHP rocks. The roadcut lies about 22 km NE from the Chinese Continental...as growth zoned garnets within both eclogite and gneiss, have been recognized. P–T conditions of the peak |  | | Journal (issue) | | anticlinorium in this area contains the Moneta gneiss that is unconformably(?) overlain by the Lynchburg...road-log area, consists of amphibolite grade two mica gneiss containing amphibolite interlayers; in the western...quadrangle it contains calcareous gneiss, marble, and calc-gneiss. Rocks that are shown as Lynchburg...consists of a lower Bassett formation (granitic gneiss containing amphibolite) that is overlain by the...anticlinorium is composed of biotite granitic augen gneiss, dated by Rankin (1971) as 1192 million years old |  | | Book | | many years the mines and fields of St. Lawrence County have furnished museums and many lucky mineral col...been depleted through the the years, St. Lawrence County continues to supply many beautiful specimens to...types and mineralized zones of the St, Lawrence County area, A detailed discussion of the geology is beyond...and metamorphic rocks are found throughout the county, the latter prevails. Since more than three-fourths...(metamorphosed gabbro) is present locally across the county. Gabbro is a dark igneous rock composed chiefly |  | | Report (issue) | | SERPENTINITES IN THE BURKS MOUNTAIN COMPLEX, COLUMBIA COUNTY, GEORGIA Mark D. Cocker GEORGIA DEPARTMENT OF...SERPENTINITES IN THE BURKS MOUNTAIN COMPLEX, COLUMBIA COUNTY, GEORGIA Mark D. Cocker Georgia Department of...SERPENTINITES IN THE BURKS MOUNTAIN COMPLEX, COLUMBIA COUNTY, GEORGIA by Mark D. Cocker ABSTRACT calculated...south and southeast of Pollards Corner, Columbia County, Georgia. The investigation consisted of field...miles (3.5 km) ESE of Pollards Corner in Columbia County, Georgia (Fig. 1). The northwestern comer of the |  | | Journal (article/letter/editorial) | | 3145 134 Biotite quartz monzonite gneiss, Mount Evans pluton; roadcut, tributary valley of Yankee Creek...Hill quadrangle. Hornblende biotite granodiorite gneiss, Mount Evans pluton; ridge north of Peedee Creek...Creek, Idaho Springs quadrangle. Granodiorite gneiss, Mount Evans pluton; knob north of head of Peedee Creek...quadrangle. Biotite granodiorite gneiss, Mount Evans pluton; roadcut on Colorado Highway 5, 1 km S20°W...Springs quadrangle. Granodiorite gneiss, Mt. Evans pluton; roadcut on Colorado Highway 5, 1.5 km S50°E |  | | Book | | WARWICKITE OCCURRENCE 3 7 DIAMOND LAKE ROADCUT 3 8 GRACE LAKE ROADCUT 3 8 DESMONT MINE 3 9 ESSONVILLE... epidote, garnet, pyroxene 26 BOWER'S POINT ROADCUT Herschel augite, calcite, scapolite, titanite...titanite, tourmaline, uranothorite 39 DIAMOND LAKE ROADCUT Herschel feldspar, hornblende, mica, pyroxene... ESSONVILLE ROADCUT Monmouth fluororichterite, phiogopite, diopside, calcite FARADAY HILL ROADCUT Faraday...pyrite, scapolite, sodalite, zircon GRACE LAKE ROADCUT Dudley tremolite/actinolite, diopside, phiogopite |  | | Report (issue) | | mica schist and gneiss, amphibolites, migmatites and generally layered granitic gneiss of early Precambrian...in the crystalline terrane. The mica schist and gneiss and amphibolite southwest of Newland pass northward...become increasingly abundant into layered migmatitic gneiss in which granitic layers predominate, and finally...nonlayered granitic gneiss. (fig. 2). This transition zone between schist and gneiss is wide west of Newland...Newland, but to the south, layered gneiss in which granitic layers predominate is in almost direct contact |  | | Report (issue) | | mica schist and gneiss, amphibolites, migmatites and generally layered granitic gneiss of early Precambrian...in the crystalline terrane. The mica schist and gneiss and amphibolite southwest of Newland pass northward...become increasingly abundant into layered migmatitic gneiss in which granitic layers predominate, and finally...nonlayered granitic gneiss. (fig. 2). This transition zone between schist and gneiss is wide west of Newland...Newland, but to the south, layered gneiss in which granitic layers predominate is in almost direct contact |  | | Report (issue) | | Excavations, Serpent Mounds Provincial Park. 19 Roadcut in a drumlin, Otonabee township. 20 21 Young anglers...Stony Lake. Picnicking on an outcrop of granite gneiss, Stony Lake. 31 33 Mill and plant of Indusmin Ltd...of Paudash Lake, Highway 28. Faraday metagabbro roadcut, Highway 28 near Bancroft. York River below Baptiste...the Princess sodalite mine near Bancroft. Granite gneiss cliffs just outside Bancroft. View from Eagles...fault, Monteagle township. Contact of the nepheline gneiss with nepheline pegmatite, Golding-Keene quarry |  | | Journal (article/letter/editorial) | | comprehensive listing, including detailed spot locations on county road maps, refer to this publication, which can...The price is $5.00 plus 4% sales tax. Individual county road maps can be obtained from the North Carolina...Carolina 27611 B. J . M C K E N Z I E Alamance County Pyrophyllite, cacoxenite, diaspore, sericite, pyrite...hill, 0.2 mile from the road. Alexander County Alexander County is a renowned mineral collecting area in...following are mineral collecting sites in Alexander County: 1) Emerald, rutilated quartz, smoky quartz, and |  | | Book | | Potomac River in Loudon County to the Tennessee-North Carolina border in Grayson County. 4) East of the Blue...will become the Shenandoah Valley, is granite and gneiss; the limestones, sandstones, and shales are yet...metamorphism and, thus, converted into a streaky gneiss. Rifting that began to open the Atlantic Ocean...geologic province Sheared granite appears in the roadcut on the west side of Middleburg. Walls, foundations...junction with Virginia 28, diabase crops out in the roadcut. Where the diabase is homogeneous and relatively |  | | Book (edition) | | surrounding countryside. No railroads enter Taos County, and there is no heavy industry. The outlying villages...dips into the Rio Hondo valley. The gravel in the roadcut is like the gravel we saw in the Rio Grande gorge...opposite light-colored rock. This rock is granite gneiss. It has grains of quartz (clear, glassy) and feldspar...last stop, it is streaked or banded. This granite gneiss once looked much like the granite of Stop B. However...schist; coarsely banded metamorphic rocks are called gneiss. Metamorphism may take place when heat from molten |  | | Report (issue) | | quarry Renfrew–Madawaska area Renfrew County Road 4 (Bruce Avenue) roadcut Highway 60 quarry Jamieson marble...Carswell quarry Bryson marble blocks Bryson roadcut 1 Bryson roadcut 2 New Calumet mine Calumet uranium occurrence...Most of the collecting localities are in Renfrew County, Ontario. A wide variety of minerals are found...quartz, graphic granite, and corundum from Renfrew County; feldspar (peristerite, amazonite), jaspilite,...Hornblende gneiss Feldspar gneiss Hornblende schist Biotite schist Syenite Amphibolite Syenite gneiss Syenite |  | | Journal (issue) | | described a peculiar variety of quartz from Nelson County, Virginia. This new variety of quartz, as cited...The complex extends from Loudoun County in the north to Grayson County in the south. A few occurrences...rock units consisting of quartz-oligoclase-biotite gneiss, spilitic greenstone, metatuff, quartzites, dolomites...from Precambrian to Cambrian, overlie Precambrian gneiss and granite. The Blue Ridge Complex forms the core...blue quartz. Pebbles along Byrd Creek in Goochland County show excellent chatoyancy (Dietrich, 1970). ASTERISM |  | | Report (volume) | | 1). lnterlayered with the biotite gneiss is a thick leucocratic gneiss unit, granitic in appearance, that...that is referred to as microline gneiss. Hornblende gneiss and amphibolite, a third unit, is generally...biotite gneiss and microcline gneiss units. Hornblende -gneiss, biotite gneiss, and microcline gneiss are...units, including those of calc-silicate gneiss, garnet-quartz gneiss, and quartzite. Amphibolite, as small...rock units. It is more massive than hornblende gneiss, generally finer grained, and may have a well-developed |  | | Report (issue) | | izon at top of roadcut on left displays A, Band C soil horizons. 1.0 105.4 Pima County line . Terrace...tilted, Plio-Pleistocene valley-fill alluvium . 0.9 Roadcut on right contains a well-exposed angular unconformity...and underlying Pantano Formatio (Tp) ex posed in roadcut on right of highway ( R. Mortimer photo). Perhaps...porphyry dike cuts this assemblage at north end of roadcut on left; beyond, roadcuts are in the Sycamore stock...ounces of gold. 0.5 120.0 Low hills to west and roadcut ahead on left are in Bisbee Group that is tightly |  | | Book | | and appropriate. Post miles give mileage on a per-county basis. Some counties place post mile signs only...given county. Mileage increases eastward or northward and then restarts at 0 at the next county line....is Santa Barbara County; 29.00 is highway mileage from the south boundary of the county. Post miles are...Gabriel Mtns. 2,500 ~4,000| ~4,600 *\ Formation of gneiss now in Mojave Desert, central Transverse Ranges...almost every age of rock, from 2.5-billion-year-old gneiss to 3,000-year-old volcanic cinders, and every type |  | | Report (issue) | | MAP OF CUYAMACA PEAK 7% f QUADRANGLE, SAN DIEGO COUNTY, CALIFORNIA By Victoria R. Todd Open-file report...map of Cuyamaca Peak 7%' quadrangle, San Diego County, California Purpose of project: Published maps...Peninsular Ranges batholith in southern San Diego County comprise a relatively unfaulted block but topographic... 2). Gneissic textures include augen gneiss and mylonite gneiss. Petrographic study reveals igneous textures...feature of the plutonic rocks in southern San Diego County is the prevalence of synplutonic contacts between |
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