Common Minerals and Rocks
... rocks in this great group of silicates are mixed , or consist each of several essential minerals . Quartz is the only important constituent of these rocks which is not , strictly speaking , a silicate , but in a cer- tain sense it is ...
A Contribution to the Geology of the Pre-Cambrian Igneous Rocks of the Fox River Valley, Wisconsin
... rock . While the evidence of the extrusive origin of this rock is not conclusive , yet from its analogy with the other rhyolite outcrops , and from the evidence of the fragments , the Berlin rock is believed to be a surface rock like ...
Acid Mine Drainage, Rock Drainage, and Acid Sulfate Soils
... rocks.) It is important to keep in mind that the lines drawn through the origin of the scatterplot are constant-ratio lines they are not regression lines. On the scatterplot ... Rocks plotting. ROCK AND ALTERATION LITHOGEOCHEMISTRY 275.
U.S. Geological Survey Professional Paper
... Rocks examined microscopically are indicated with an asterisk ( * ) ] Well Data on Volcanic Rocks Location Eleva- Total Year tion depth begun Interval Thick- ness pene- trated Well bottomed in- Remarks Overlain_by- 118+ 8,946 1949 ...
Show Me Rocks and Minerals
From molten lava to glittering crystals, there's so much to learn about rocks and minerals. Show Me Rocks and Minerals has more than 100 facts and definitions about these amazing substances.
Rock Slope Stability Analysis
... rock slabs . Table 2.2 reports some typical values of uniaxial compressive strength ob- tained in Italian rock mechanics laboratories . Terraced rocks can determine stability problems when deformation features of the alternate layers ...
National Geographic Family Reference Atlas of the World
... rocks form from mineral or rock fragments , or from organic material that is eroded or dissolved and then deposited at Earth's surface . Metamorphic rocks form when rocks of any origin ( igneous , sed- imentary , or metamorphic ) are ...
Rocks and Minerals of Tennessee
... rocks exposed at the surface in Ten- nessee are of the sedimentary type . Igneous Igneous rocks are those which have cooled and solidified from an originally molten mass . They are ordinarily characterized by a uniform- ity of texture ...
Elements of Mining
... rock . Such a rock mass is strongest in a direction transverse to the planes of weakness and weakest in a direction parallel with such planes . Sandstones , limestones , slate , shales and sheeted igneous rocks are examples . Group 3. The ...
Library of Congress Subject Headings
... rocks Gases in rocks Photography of rocks Rockfills Rocks , Crystalline Rocks , Igneous Rocks , Metamorphic Rocks , Sedimentary Rocks , Siliceous Saprolites Ventifact - Acoustic properties - Creep UF Creep of rocks BT Rock mechanics ...
The Bombay University Calendar
... rocks . - Formation of the stratified rocks . Stra- tification and lamination . Dip , strike , outcrop , and foldings of rocks . Con- formity and unconformity of rocks and their significance . Outliers and inliers . Joints in stratified ...
Proceedings of the ... Convocation of University of the State of New York
University of the State of New York. wear of pre - existing rocks ; rocks formed by water deposit- ing solids and by solution and suspension ; mechanical agency of water in forming rocks ; rocks formed from organic remains ; limestones ...
Bulletin
... Rocks were second in average production with 176.5 eggs per bird , but since there were ten pens represented in Barred Plymouth Rocks and only one pen in White Wyandottes , the comparison is unfair to the Plymouth Rocks . The size of ...
Canadian Mining Journal
... rocks . Volcanic ash rocks . Agglomerate Post - Volcanic Diorite Iron formation . Keewatin : rocks . Rhyolites . Lavas of intermediate composi- tion . Amygdaloidal basalt , greenstone , etc. The occurrence of greenstone , overlain by ...
Annals of the New York Academy of Sciences
... Rocks , p . 11 . pennæ - dædali , id . , 1885 ; 3d Rept . Comm . Fossil Phyllopoda Pal . Rocks , p . 3 . pennæ - dædali , Hall & Clarke , 1888 ; Pal . New York , vol . 7 , p . 200 , pl . 35 , fig . 24 . pennæ - dedali , Etheridge ...
Engineering-contracting
... Rock . Remarks . 11 - Hard Rocks . 32 - Medium hard rocks . 3 - Soft rocks . 1906 No. Jan. 170 0 170 106 46 152 6 19 8.94 Feb. 0 191 191 104 24 128 3 16 11.93 1.60 1.83 Mainly hard diabase Softer lime rock March . 332 66 398 205 77 282 ...
The Cyclopedia of India
... rocks occur in some of the divisions of the succeeding Kada- pah , but never in such bulky masses . The brilliantly coloured banded jaspers are amongst the most conspicu- ous rocks of the oldest sediments , Banded Jasper . but they are ...
Manual of the Geology of Ireland
... rocks , 201 . Caherconlish , columns , 201 . Caherconree , fossils , 39 . Cape Clear island , 55 , 336 . Carboniferous , 5 , 63 ; cherty zones , 65 ; conglomerate , 33 , 308 ; eruptive rocks , 195 , 196 , 198 , 199 , 203 , 206 , 218 ...
Parliamentary Debates
... rocks , called the Platters Rocks , and inside this point an area of something like 250 acres is not available for the harbour of refuge . The question of removing these rocks has been brought before the couragement to the people of the ...
House documents
... Rock , upon which vessels were frequently stranded at ebb tide when the currents swept directly over the rock . To the northward , near the mouth of the Harlem River , lay the two Mill Rocks , both of which were usually visible at high ...