Argyll and the Islands - Scottish Natural Heritage
... they form the southern part of the Rhinns of Islay. They are around 1,800 million years old, much older than the Dalradian rocks, but not as old as the oldest rocks on the British Isles, the Lewisian gneisses of the Outer Hebrides and North-west Highlands. The rocks of the Rhinns are also gneisses; ...
... they form the southern part of the Rhinns of Islay. They are around 1,800 million years old, much older than the Dalradian rocks, but not as old as the oldest rocks on the British Isles, the Lewisian gneisses of the Outer Hebrides and North-west Highlands. The rocks of the Rhinns are also gneisses; ...
. - Carolina Geological Society
... from a variety of pre.-existing rocks. In Kings Mountain Park, phyllite contains outlines of clasts suggestive of volcanic breccia. Schistose meta-tonalite is a distinctive rock type occurring mainly in the Kings Mountain belt. The rock is strongly foliated to nearly massive and commonly grades into ...
... from a variety of pre.-existing rocks. In Kings Mountain Park, phyllite contains outlines of clasts suggestive of volcanic breccia. Schistose meta-tonalite is a distinctive rock type occurring mainly in the Kings Mountain belt. The rock is strongly foliated to nearly massive and commonly grades into ...
Lecture 5B / Igneous Rocks
... These lecture notes are very similar to the ones I use in my traditional classes. You’ll find they are loaded with imagery and streamlined text that highlight the most essential terms and concepts. The notes provide a framework for learning and, by themselves, are not meant to be a comprehensive sou ...
... These lecture notes are very similar to the ones I use in my traditional classes. You’ll find they are loaded with imagery and streamlined text that highlight the most essential terms and concepts. The notes provide a framework for learning and, by themselves, are not meant to be a comprehensive sou ...
Geology of the Dogskin Mountain Quadrangle, northern Walker
... exposed tephra and ash beds; well sorted, subangular to well-rounded grains. Finely laminated bedding to massive 2–3 m thick layering; thicker layers are typically well lithified sandstone (2–3 m). Sandstone is composed dominantly of volcanic lithic grains. Siltstone, diatomaceous shale, and ash lay ...
... exposed tephra and ash beds; well sorted, subangular to well-rounded grains. Finely laminated bedding to massive 2–3 m thick layering; thicker layers are typically well lithified sandstone (2–3 m). Sandstone is composed dominantly of volcanic lithic grains. Siltstone, diatomaceous shale, and ash lay ...
Geologic Map of the Silver Creek Quadrangle, Socorro County, New
... protolith. Gneiss is generally felsic, composed mostly of K-spar and quartz) and is quite fine-grained. In places, mylonite zones are present within this gneiss, however it appears that the fine grain size is primary. It is generally strongly foliated/lineated to a similar degree as Xgn, Xa, and Xmg ...
... protolith. Gneiss is generally felsic, composed mostly of K-spar and quartz) and is quite fine-grained. In places, mylonite zones are present within this gneiss, however it appears that the fine grain size is primary. It is generally strongly foliated/lineated to a similar degree as Xgn, Xa, and Xmg ...
- Free Documents
... waves S waves impart vibrations perpendicular to their direction of travel. P waves are the first to arrive and be recorded at geophysical research stations throughout the world. The waves are further differentiated by the kinds of motions they impart to rock particles. Earthquakes can release energ ...
... waves S waves impart vibrations perpendicular to their direction of travel. P waves are the first to arrive and be recorded at geophysical research stations throughout the world. The waves are further differentiated by the kinds of motions they impart to rock particles. Earthquakes can release energ ...
The stratigraphic succession of Ghana
... geological mapping is still mainly at reconnaissance level. Foliation of the supracrustals is almost everywhere steep and parallel to original sedimentary layering, and sedimentary structures that would give way-up indications are not always easy to find. Structures are often complex and, where diff ...
... geological mapping is still mainly at reconnaissance level. Foliation of the supracrustals is almost everywhere steep and parallel to original sedimentary layering, and sedimentary structures that would give way-up indications are not always easy to find. Structures are often complex and, where diff ...
Alteration zone Mapping in the Meiduk and Sar Cheshmeh Porphyry
... 0.775-0.805 μm, b6: 0.845-0.890 μm); and three bands in SWIR (b7: 1.200-1.300 μm, b8: 1.550-1.750 μm, b9: 2.0802.350 μm)). In the field of geology, VNIR bands (0.4 to 1.0 μm) are especially useful for discriminating among ferric-iron bearing minerals. SWIR bands (1.20 to 2.35 μm) are sensitive to hy ...
... 0.775-0.805 μm, b6: 0.845-0.890 μm); and three bands in SWIR (b7: 1.200-1.300 μm, b8: 1.550-1.750 μm, b9: 2.0802.350 μm)). In the field of geology, VNIR bands (0.4 to 1.0 μm) are especially useful for discriminating among ferric-iron bearing minerals. SWIR bands (1.20 to 2.35 μm) are sensitive to hy ...
A2 Course Study Guide
... Viscosity is one of those concepts which can be usefully banded about conversationally, but which are mine fields of complexity when used quantitatively. In everyday terms, viscosity describes the sluggishness of fluid; its resistance to being stirred. Notice the term fluid, rather than liquid: the ...
... Viscosity is one of those concepts which can be usefully banded about conversationally, but which are mine fields of complexity when used quantitatively. In everyday terms, viscosity describes the sluggishness of fluid; its resistance to being stirred. Notice the term fluid, rather than liquid: the ...
GEY_309_1
... Like the Tindouf basin, it is also asymmetric, with a gentle southwestern limb that dips gently off the Reguibat massif, and a steeper northeastern limb that is bound by the Ougarta range. The Sirte Basin of Libya: The Sirte basin is a major sedimentary basin that extends southward from the Gulf of ...
... Like the Tindouf basin, it is also asymmetric, with a gentle southwestern limb that dips gently off the Reguibat massif, and a steeper northeastern limb that is bound by the Ougarta range. The Sirte Basin of Libya: The Sirte basin is a major sedimentary basin that extends southward from the Gulf of ...
tomingley gold project – geological setting and mineralisation
... The immediate Wyoming area is almost entirely covered by alluvial sequences of clays, sand and gravel of Quaternary to Cretaceous age up to 50 m thick. The gold deposits at Wyoming are hosted within volcaniclastic sediments, rare lavas and shallow intrusive porphyritic rocks. The volcanic units are ...
... The immediate Wyoming area is almost entirely covered by alluvial sequences of clays, sand and gravel of Quaternary to Cretaceous age up to 50 m thick. The gold deposits at Wyoming are hosted within volcaniclastic sediments, rare lavas and shallow intrusive porphyritic rocks. The volcanic units are ...
Cambrian and Ordovician Systems (Sauk Sequence and
... underlie most of Illinois and include the entire Sauk sequence and part of the overlying Tippecanoe sequence. These rocks are an important source of material to make cement, construction aggregate, glass sand, and agricultural lime. Locally, they contain oil and gas, and their potential for bearing ...
... underlie most of Illinois and include the entire Sauk sequence and part of the overlying Tippecanoe sequence. These rocks are an important source of material to make cement, construction aggregate, glass sand, and agricultural lime. Locally, they contain oil and gas, and their potential for bearing ...
GEOLOGY OF THE HØLONDA-HULSJØEN AREA, TRONDHEIM
... In the present area the porphyrites can be regarded as intrusive sill like bodies, which were generally concordant with the bedding of the country rocks and subsequently deformed together with the sediments. Their occurrence is confined to a relatively narrow stratigraphical hori zon, viz. the top p ...
... In the present area the porphyrites can be regarded as intrusive sill like bodies, which were generally concordant with the bedding of the country rocks and subsequently deformed together with the sediments. Their occurrence is confined to a relatively narrow stratigraphical hori zon, viz. the top p ...
The Gold Belt of the Blue Mountains of Oregon
... of very extensive Triassic beds in the Eagle Creek Range, extending from there across Snake River into Idaho, to the vicihity of the Seven Devils. If the sedimentary rocks in the vicinity of Huntington belong to the same age, as is possible, though by no means certain, the area of the Triassic would ...
... of very extensive Triassic beds in the Eagle Creek Range, extending from there across Snake River into Idaho, to the vicihity of the Seven Devils. If the sedimentary rocks in the vicinity of Huntington belong to the same age, as is possible, though by no means certain, the area of the Triassic would ...
The Formation of Minerals - newyorkmineralogicalclub.org
... Rocks freshly exposed at the earth's surface immediately begin to break down by weathering and erosion. Weathering refers to the physical attack by the daily and seasonal cycles of temperature and rainwater, and also chemical corrosion by dissolved carbon dioxide, and organic acids from plants. Eros ...
... Rocks freshly exposed at the earth's surface immediately begin to break down by weathering and erosion. Weathering refers to the physical attack by the daily and seasonal cycles of temperature and rainwater, and also chemical corrosion by dissolved carbon dioxide, and organic acids from plants. Eros ...
Colour version - the Dartmoor National Park Authority
... today. In some areas chemicals are breaking down, weathering, or rotting the granite. In others the granite is still as hard as it was when it formed. Some tors are large rounded features (for example Haytor); others that have been shattered by frost and ice look like jumbled piles and heaps (for ex ...
... today. In some areas chemicals are breaking down, weathering, or rotting the granite. In others the granite is still as hard as it was when it formed. Some tors are large rounded features (for example Haytor); others that have been shattered by frost and ice look like jumbled piles and heaps (for ex ...
2 A Grand Canyon
... The striking outcrops of the inner gorge illustrate several simple rules geologists have used for centuries to read the story of rocks the world over. The first is that layers of sedimentary rock that accumulate in depositional environments, like sandstone and shale, represent time and are deposited ...
... The striking outcrops of the inner gorge illustrate several simple rules geologists have used for centuries to read the story of rocks the world over. The first is that layers of sedimentary rock that accumulate in depositional environments, like sandstone and shale, represent time and are deposited ...
LECTURE 19
... Geologic sketch map of the South Island of New Zealand showing the Mesozoic metamorphic rocks east of the older Tasman Belt and the Alpine Fault. The Torlese Group is metamorphosed predominantly in the prehnite-pumpellyite zone, and the Otago Schist in higher grade zones. X-Y is the Haast River Sect ...
... Geologic sketch map of the South Island of New Zealand showing the Mesozoic metamorphic rocks east of the older Tasman Belt and the Alpine Fault. The Torlese Group is metamorphosed predominantly in the prehnite-pumpellyite zone, and the Otago Schist in higher grade zones. X-Y is the Haast River Sect ...
Diamonds - Geotech.org
... Diamonds form in nature only under the extreme conditions found in the upper mantle at depths of 150 to 200 kilometers (possibly down to 300 kilometers): pressures of greater than 50 kilobars (50,000 x normal atmospheric pressure) and temperatures of 900 to 1,300øC and possibly higher. The diamonds ...
... Diamonds form in nature only under the extreme conditions found in the upper mantle at depths of 150 to 200 kilometers (possibly down to 300 kilometers): pressures of greater than 50 kilobars (50,000 x normal atmospheric pressure) and temperatures of 900 to 1,300øC and possibly higher. The diamonds ...
porphyry copper-type mineralization and geosynclinal
... it lies on the western side of the volcanic chain, coinciding approximately with it, between latitudes 31° to 36° south, and continuing along its eastern side fading southwards into Argentina where it can be traced at least as far as 39° South. The belt is probably found again in Southern Chile asso ...
... it lies on the western side of the volcanic chain, coinciding approximately with it, between latitudes 31° to 36° south, and continuing along its eastern side fading southwards into Argentina where it can be traced at least as far as 39° South. The belt is probably found again in Southern Chile asso ...
Poster (PDF)
... scapolite, and sinhalite (MgAlBO 4). Some serendibite is altered to uvitic tourmaline. This occurrence of serendibite in a calc-silicate layer of the Franklin Marble of New York joins three other Grenville Province localities: near Johnsburg in the Adirondack Highlands, near Russell in the Adirondac ...
... scapolite, and sinhalite (MgAlBO 4). Some serendibite is altered to uvitic tourmaline. This occurrence of serendibite in a calc-silicate layer of the Franklin Marble of New York joins three other Grenville Province localities: near Johnsburg in the Adirondack Highlands, near Russell in the Adirondac ...
Chapter 4 Rocks
... 1. The continuous changing and reforming of rocks is called deposition. _______________ ...
... 1. The continuous changing and reforming of rocks is called deposition. _______________ ...
Silver in magmatic processes
... The aqueous solutions associated with such weathering, commonly copper-bearing acidic iron sulfate solutions, percolate downward toward the water table. If the solutions contact acid neutralizing rocks, copper can be precipitated in the form of carbonates (e.g. malachite and azurite) from contact wi ...
... The aqueous solutions associated with such weathering, commonly copper-bearing acidic iron sulfate solutions, percolate downward toward the water table. If the solutions contact acid neutralizing rocks, copper can be precipitated in the form of carbonates (e.g. malachite and azurite) from contact wi ...
GEOLOGY OF THE EARLY MIOCENE ALAÇAMDAĞ (DURSUNBEY
... dacitic intrusions, domes, lava flows, dykes and volcanogenic sedimentary rocks. The unit is exposed in an area of about a few tens of km2 in the south of Saðýrlar and southeast of Dursunbey (Figure 6). Intrusions are located in the east of Yaðcýlar and south of Deðirmenciler. They have circular pla ...
... dacitic intrusions, domes, lava flows, dykes and volcanogenic sedimentary rocks. The unit is exposed in an area of about a few tens of km2 in the south of Saðýrlar and southeast of Dursunbey (Figure 6). Intrusions are located in the east of Yaðcýlar and south of Deðirmenciler. They have circular pla ...
Clastic rock
Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus, chunks and smaller grains of rock broken off other rocks by physical weathering. Geologists use the term clastic with reference to sedimentary rocks as well as to particles in sediment transport whether in suspension or as bed load, and in sediment deposits.