 | | Report (volume) |
| ..................... Primary divisions of the region..--.........-.--.-.--.-.-.. Okanogan Valley .....-----.-.------.....-----.-.-.-...---Mount Baker district ................................... ..... Preliminary...............\................. ........ .... Occurrence........................................................:...................... 34 Hamilton district............................ .."..... .. .--.....dioritic rocks ............................... 45 Gabbro and diabase near Loomis ............-.---....-- |
 | | Report (volume) |
| diorite.___-_____-___-_-___-__-_.--____-_______ . Gabbro and norite.___________________________________...____________________________________________ Occurrence of quicksilver near Tiller_._-_____--_-_-________...marcasite__________________ 20. Geologic map of Meadows district.-____-_--_____-----___-21. Map of Dave Force mine_-___...the Cascade Mountains from Blackbutte, 15 miles south of Cottage Grove, to the Rogue River. As the eastern...southwestern parts of this quicksilver-bearing region lie within the Cascade and Klamath Mountains they |
 | | Journal (volume) |
| AHVENISTO MASSIF IN FINLAND THE AGE OF THE SURROUNDING GABBRO-ANORTHOSITE COMPLEX AND THE CRYSTALLIZATION OF...AHVENISTO MASSIF IN FINLAND THE AGE OF THE SURROUNDING GABBRO-ANORTHOSITE COMPLEX AND THE CRYSTALLIZATION OF...ROCKS OF THE GABBRO -ANORTHOSI TE COMPLEX . . . . . . . . . . . .. . MARGINAL ZONES OF THE GABBRO-ANORTHOSITE...OF THE GABBRO-ANORTHOSITE COMPLEX AGAINST OLDER ROCKS AND THE BOUNDARIES BETWEEN DIFFERENT GABBRO -ANORTHOSITE...30 CONTACTS BETWEEN THE MICROCLINE GRANITE AND GABBRO -ANOR THOSITE INTRUSIONS . . . . . . . . . . . |
 | | Journal (article/letter/editorial) |
| Falls, the most important town in the iron-bearing district of the same name. All are to be found in an area...direct contacts, but it is inferred from the occurrence of sedimentaries between the igneous exposures...under the title of "The Crystal Falls Ironbearing District of Michigan." For details which are not warranted...sedimentaries and intrusion of molten magma in a district no farther removed from the scene of eruptive...eruptive activity than is the Crystal Falls district from the Keweenawan, a distance of about thirty miles. It |
 | | Report (issue) |
| GEOLOGY -AND ORE DEPOSITS OF THE MAGDALENA MINING DISTRICT, NEW MEXICO BY G. F. LOUGHLIN AND A. H. KOSCHMANN...Gabbro____________________________________ • Distribution and occurrence ______________ _ Lithology ______________________...____________________________ ______ _ 9 Distribution and occurrence _____________ _ . Ltlhology _____ __________...______________________________ ~ ____ _ Distribution and occurrence _____________ _ Lithology ___ .. _________________________...__________ __ _________ ____ _ 12 Distribution and occurrence ___ __________ _ 12 Lithology ________ _________ |
 | | Report (issue) |
| Mountains south of Panther Creek........................... ............................. South End Hills... .. . .. .. . .. .. .. . . .. . . .. . . .. .. Region north of Gallatin R1ver....... .. .. .. .. .. ..................... 89 Geological sketch of the region......................... ......................... .. .. .. .. .. .. 152 Cr;rstalline n,xis aud region east . . .. . . .. .. .. .. .. .. .. .. .. .. ............................... :............ 168 Region of Wildcat Peak and Huckleberry Mountain...... |
 | | Report (volume) |
| ...................................... Preston gabbro.................................................................................. Effect of the gabbro intrusion.................................. Effect......................................... Preston gabbro..................................................the Preston gabbro......I............ T.. Contract metamorphism. due to the Preston gabbro............................. Chlorite and asbestos veins in gabbro................................ Special erosionalfeatures |
 | | Report (issue) |
| WALCOTT, ])irector THE VERMILION IRON-BEARING DISTRICT OF MINNESOTA \VITH J. AN ATLAS M:oRG^]sr cle]mej^ts...of the I. 29 district 29 Introduction Previous geologic work 29 in the district Scope of the paper...Mesabi or Giants range. Area north and northwest The gabbro plateau 35 of Giants 36 37 38 range Gunfiint...Ely greenstone 130 Features of the greenstone Occurrence and character Distribution 131 131 - Exposures...composition of the metamorphosed rocks Contact effect of gabbro on greenstone Relation to adjacent formations |
 | | Report (volume) |
| distribution________________________________ Ketchikan district.._______________________________________ Vicinity..._ Page 45 49 49 52 57 59 60 66 68 68 Juneau district..... ____________--___-____-_-. Schistose greenstone...neighboring islands.____________________ Character and occurrence.______________________________ Fossils..------...rocks-___________________________________ Southern Ketchikan district, by Theodore Chapin_______. 88 90 90 94 94 94...__-_--________-----___---------__---Character and occurrence._____-___-______--_--_-__-_-_ Age and correl |
 | | Report (volume) |
| .............................. Character and occurrence.................................. Metamorphism............................... *Condition of the region in pre-Cambrian time................... Algonkian................................. Character and occurrence. .^ ........................... Smithfield limestone...................... Iron ores of the Richmond district............................. Eastern Massachusetts............................................... Occurrence............................................. |
 | | Book (edition) |
| zonations a section of a tourmaline crystal (.Malagasy Republic) in 32 be deposited on growth surfaces (crystal...objects or replacing fibers of wooden supports. Occurrence up to 3 cm (1 .1 The 8 finest crystals of...mineral, either in ciated with calcite or e Occurrence The finest dendritic and wirelike crystals come...deposits, formed at high hydrothermal conditions. Occurrence The main gold-bearing temperature under districts...districts are the Witwa- tersrand (South Africa), the Mother Lode (California, USA), the Yukon (Alaska |
 | | Report (volume) |
| schist-__--__-____-__-_-____--__--_-.-__--___ Occurrence ______--_----_-_---_-_---_-------------------General...greenstone-----___-_-_-_-_-__---__--__-____--_-----___ Occurrence __-_-_____--__-_._--___-_-_. ________ .___ General...group ----_-----_-_--__..____-_-----_-_--___ Occurrence ______________________________________________... ______-___-_____________________ ______.___ Occurrence __-___-___-___-__-.___-___-___________-_-_--__..._____________________________________________ Occurrence _---__-----_-_-___________-___________________ |
 | | Report (volume) |
| Appalachian region................................................... 21 21 Great Lakes region...........Mississippi Valley region.............................................. Ozark region.....................Rocky Mountain region............................................... Great Basin region ................Appalachian region....................................:.............. Great Lakes region ..............Rocky [Mountain region............................................... Great Basin region ............. |
 | | Report (volume) |
| ................ Geography of the Yukon-Tanana region..................................... Geography..................... Geology of the Yukon-Tanana region........................................ Geology..... 37 37 37 37 38 38 39 39 40 40 40 40 40 41 Gabbro....................................................................... Gold in the Yukon-Tanana region........................................... General.................................... Birch Creek district.............................................. |
 | | Report (volume) |
| ............................... Seven Troughs district.................................................Outlook for the district................................................. Rosebud district................................................... Red Butte district........................................................................ Chafey and the Sierra district.......................................... Kennedy............ Types of deposits represented in the region................................... Basis of classification |
 | | Report (volume) |
| ............ 49 Gabbro on Esther Island.............................x.... 49 Gabbro on Latouche Island...1908, which complete the preliminary work in this district. Should the mining interests continue to develop...far as possible the general laws governing the occurrence of the ore bodies. Incidental to this study,... facts were gathered bearing on the occurrence and extent of individual ore bodies, and many of these...however, that this statement of the geology of the region will be of great benefit to the mining interests |
 | | Journal (article/letter/editorial) |
| One characteristic of the Shimanto belt is the occurrence of well developed magmatic bodies of Middle Miocene...Most of the studied igneous complexes lie to the south of the BTL (Fig. 1 ). K-Ar (mineral and whole-rock)...Muroto and Shionomisaki Eto T-Morb are located far south along the Pacific coast. The I-type complexes crop...assemblages. The complexes show various modes of occurrence. Shibisan, Takakuma, Ichifusa, Uwajima 88 ...Petrography The Ashizuri complex, ranging from gabbro to syenite and biotite-granite, is the only alkaline |
 | | Report (volume) |
| ............................. Basic stock; its gabbro and diorite phases -................_...... Basic...and a study of the geological structure of the region proves, that Ascutney is a residual of erosion...weather than either the gabbro-diorite stock on the north or the gneisses on the south. The shapely cone north...gorge-like part of its course between the elbow south-southeast of Windsor and its confluence with the...a complex stock-like boss. The structure of the region shows that the radiating drainage is not the result |
 | | Book |
| Introduction ExperimentaJ In ves tigations on the Gabbro-Ec)ogite Transformation 1-3 Petrological Application...treatment of the deep mantle is placed upon the occurrence of high-pressure phase transformations and the...the physical chemistry of magma genesis in this region. It is now possible to reproduce statically in...(Figs. 0-1 and 0-2). The crust is defined as the region extending from the surface to the Mohorovicic discontinuity...depth of about 400 km lies the upper n1antle. This region is characterized by regional variations in velocity |
 | | Journal (volume) |
| Third Floor, Ferry Building, San Francisco 11 District Offices State Building, 217 West 631 J Street...are also sold at the Los Angeles and Sacramento district ; ; ; offices. In addition to oral conferences...Brumley-Donsddson Company's excavation in alluvium east of South San Francisco, source of San Francisco 440 molding...sands for steel foundries from the Ottawa-Illinois district had accelerated with the growth of the steel-casting...The deposits in the Black Hills of Wyoming and South Dakota represent this first type. Montmorillonite |
 | | Report (volume) |
| .............................................. Gabbro......................................................................................... 57 Occurrence and character..................................ILLUSTRATIONS. Pago. PLATE I. Map of the St. Cloud region, Minn., showing rock outcrops and quarries.......FIGURE 1. Sketch map showing relations of rocks south of Sauk Rapids Bridge, sec. 2, St. Cloud Township...St. Cloud region................... 56 58 6. Strike of aplite dikes in the St. Cloud region......... |
 | | Report (volume) |
| 68 Syenitic rocks___________________________ 68 Gabbro _____________________________ 69 Diabase _________________...districts, camps, and properties Continued. Helvetia district Continued. Helvetia camp Continued. Other pro...Helena mine ______________________________ Empire district-__________ _________________ General features...camps, and properties Continued. Page. Empire district Continued. Davidson Canyon and vicinity___________________...camps, and properties Continued. Page. Old Baldy district Continued. . ' Lode deposits Continued. Madera |
 | | Report (issue) |
| PROFESSIONAL PAPER 70 J..,l ' THE MOUNT· McKINLEY REGION, ALASKA . BY ALFRED H. BROOKS WITH DESCRIPTIONS............. __ .• Metamorphic rocks in Knik Arm region ............... ·_ ........... _...... __ .......Undifferentiated Paleozoic rocks in the headwater region of the Susitna .....•............... : .. 68 Tatina...Undifferentiated Paleozic rocks of Yukon-Tanana region ..................................... . 83 '84.................... . 106 Cook Inlet and Susitna region ........................................... ~ |
 | | Report (volume) |
| preceding the descriptions of the quarries of each district. The Rosiwal method of estimating mineral percentages...are not due to pressure which affected the entire region, but that they originated while the granite masses...north) acquires an inclined rift if split from the south or the east or west. 'The cause of this is not apparent..., Geological and topographical features of the region about Atlanta, Ga.: Am. Geologist, vol. 14, 1894...c Turner, H. W., The Pleistocene geology of the south-central Sierra Nevada, with especial reference to |
 | | Report (issue) |
| ............................................ Occurrence. ...............................................-...-.-....-.-.-.-....-.-.........-.-...... Occurrence. ..............................................12 12 13 13 13 15 15 15 16 18 19 19 21 Olivine gabbro. ............................................................................... 91 Front ridge south of Buffalo........................................Bulfalo......................................... 92 Region west of .Sheridan............................. |
