San Andreas Fault Zone Mineralogy, Geochemistry, and Physical
... zones can be altered during exhumation, obscuring faultrelated mineral assemblages and textures (Solum et al., 2003; Solum and van der Pluijm, 2004). The SAFOD target zone contains two parallel strands that generate repeating M2 earthquakes in addition to having a component of creep (Nadeau et al., ...
... zones can be altered during exhumation, obscuring faultrelated mineral assemblages and textures (Solum et al., 2003; Solum and van der Pluijm, 2004). The SAFOD target zone contains two parallel strands that generate repeating M2 earthquakes in addition to having a component of creep (Nadeau et al., ...
types of oil traps
... culmination (i.e. a peak) somewhere along the fold axis so that hydrocarbons can be trapped. Anticlinal traps are commonly detected by seismic reflection. In mature oilfields, most of these simple traps have probably been found, but many anticlinal traps remain to be discovered offshore and in new p ...
... culmination (i.e. a peak) somewhere along the fold axis so that hydrocarbons can be trapped. Anticlinal traps are commonly detected by seismic reflection. In mature oilfields, most of these simple traps have probably been found, but many anticlinal traps remain to be discovered offshore and in new p ...
chapter 2 - Geophile.net
... 1. When did the direction of the Pacific plate change, and what direction was it moving before this change? * changed at 43 million years. * Before this change, it was moving north-northwest. 2. If the ocean floor is getting wider, why is the Earth not becoming larger? * old ocean floor sinks at sub ...
... 1. When did the direction of the Pacific plate change, and what direction was it moving before this change? * changed at 43 million years. * Before this change, it was moving north-northwest. 2. If the ocean floor is getting wider, why is the Earth not becoming larger? * old ocean floor sinks at sub ...
chapter 2 - Geophile.net
... 1. When did the direction of the Pacific plate change, and what direction was it moving before this change? * changed at 43 million years. * Before this change, it was moving north-northwest. 2. If the ocean floor is getting wider, why is the Earth not becoming larger? * old ocean floor sinks at sub ...
... 1. When did the direction of the Pacific plate change, and what direction was it moving before this change? * changed at 43 million years. * Before this change, it was moving north-northwest. 2. If the ocean floor is getting wider, why is the Earth not becoming larger? * old ocean floor sinks at sub ...
Directed Reading
... Directed Reading continued ______ 7. What did Wegener hypothesize about mountain ranges such as the Andes? a. that the crumpling of the crust in places produced them b. that volcanic eruptions created them c. that they always existed d. that the pressure of the oceans produced them 8. Why was Wegene ...
... Directed Reading continued ______ 7. What did Wegener hypothesize about mountain ranges such as the Andes? a. that the crumpling of the crust in places produced them b. that volcanic eruptions created them c. that they always existed d. that the pressure of the oceans produced them 8. Why was Wegene ...
Himalaya - Southern-Tibet: the typical continent
... A thin continental margin in front of cratonic India may have been subducted for about 15 Ma without triggering any major plate tectonic signal until the end of the Eocene (ca 35 Ma), when the thicker Indian Craton came in contact with Asia. Increased compressional stresses then resulted in shorteni ...
... A thin continental margin in front of cratonic India may have been subducted for about 15 Ma without triggering any major plate tectonic signal until the end of the Eocene (ca 35 Ma), when the thicker Indian Craton came in contact with Asia. Increased compressional stresses then resulted in shorteni ...
Powerpoint Presentation Physical Geology, 10/e
... Geologic structures are most obvious in deformed sedimentary rocks Tilted beds, joints, and faults are planar features whose orientation is described by their strike and dip • strike – the compass direction of a line formed by the intersection of an inclined plane with a horizontal plane • dip – the ...
... Geologic structures are most obvious in deformed sedimentary rocks Tilted beds, joints, and faults are planar features whose orientation is described by their strike and dip • strike – the compass direction of a line formed by the intersection of an inclined plane with a horizontal plane • dip – the ...
tuffs macroscopically but differing from them in being more basic as
... respectively and the great thickness and uniform petrographic character of each formation is opposed to the conception of rapid variation in the chemical composition of the ash at a single center of eruption. Assuming contemporaneous deposition from two centers of eruption it seems probable, in view ...
... respectively and the great thickness and uniform petrographic character of each formation is opposed to the conception of rapid variation in the chemical composition of the ash at a single center of eruption. Assuming contemporaneous deposition from two centers of eruption it seems probable, in view ...
church_hall
... 1987, p. 44; Thibault 1987, p. 28). Thy (1987), however, claims that the less fractionated part of the stratiform unit is younger than the more fractionated part—which it nevertheless underlies. In this respect the plutonic series likely correlates with either the older low-Ti series of the BG and L ...
... 1987, p. 44; Thibault 1987, p. 28). Thy (1987), however, claims that the less fractionated part of the stratiform unit is younger than the more fractionated part—which it nevertheless underlies. In this respect the plutonic series likely correlates with either the older low-Ti series of the BG and L ...
rocks and geology in the SF bay region
... of years (in the distant geologic past). Geologists use the geologic time scale to define the ages of rocks and the fossils they may contain, and to define when geologic events occurred. Geologic time is divided into four great eras. The Precambrian Era encompasses all time from the beginning of the ...
... of years (in the distant geologic past). Geologists use the geologic time scale to define the ages of rocks and the fossils they may contain, and to define when geologic events occurred. Geologic time is divided into four great eras. The Precambrian Era encompasses all time from the beginning of the ...
Sedimentary Rocks Lecture-HO
... Bauxite, which forms in lateritic soils in the tropics, occurs in areas where chemical weathering is so intense that only the most insoluble compounds accumulate in the soil. Aluminum is just such an insoluble compound. Laterites are the primary source of aluminum oxide, called bauxite. It is the ...
... Bauxite, which forms in lateritic soils in the tropics, occurs in areas where chemical weathering is so intense that only the most insoluble compounds accumulate in the soil. Aluminum is just such an insoluble compound. Laterites are the primary source of aluminum oxide, called bauxite. It is the ...
Hydrothermal alteration and fluid inclusion study of the Lower
... mostly 5 to 15 μm in size, but range up to 50 μm. S(NaCl,KCl) + L + V fluid inclusions, typical for most porphyry type deposits, were not found at the Tiámaro deposit, probably because drilling has not yet reached either any zone with boiled-off paleofluids or the deepest part of metal ores. This de ...
... mostly 5 to 15 μm in size, but range up to 50 μm. S(NaCl,KCl) + L + V fluid inclusions, typical for most porphyry type deposits, were not found at the Tiámaro deposit, probably because drilling has not yet reached either any zone with boiled-off paleofluids or the deepest part of metal ores. This de ...
The Geology of the Paleozoic Era
... • Siberia collided with Kazakhstania in the Pennsylvanian, forming the Altai Mountains. • Kazakhstania collided with Baltica in the Permian, forming the Ural Mountains. ...
... • Siberia collided with Kazakhstania in the Pennsylvanian, forming the Altai Mountains. • Kazakhstania collided with Baltica in the Permian, forming the Ural Mountains. ...
Geology of Peoria and Tazewell Counties
... Precambrian Era Through several billion years of geologic time, the surrounding Tazewell and Peoria counties has undergone many changes (see the rock succession column, facing page). The oldest rocks beneath the field trip area belong to the ancient Precambrian basement complex. We know relatively l ...
... Precambrian Era Through several billion years of geologic time, the surrounding Tazewell and Peoria counties has undergone many changes (see the rock succession column, facing page). The oldest rocks beneath the field trip area belong to the ancient Precambrian basement complex. We know relatively l ...
Magnesium isotopic composition of the lower continental crust
... mantle and hydrosphere requires knowledge of the bulk crustal Mg isotopic composition, which is heavily influenced by the deep crust. Here, we report Mg isotopic data for two sets of well-studied lower crustal granulite xenoliths from North Queensland, Australia (Chudleigh and McBride suites) [5, 6] ...
... mantle and hydrosphere requires knowledge of the bulk crustal Mg isotopic composition, which is heavily influenced by the deep crust. Here, we report Mg isotopic data for two sets of well-studied lower crustal granulite xenoliths from North Queensland, Australia (Chudleigh and McBride suites) [5, 6] ...
Major geologic structures between Lordsburg, New Mexico, and
... 1974, 1977; Thorman and others, 1978). Detailed studies of small areas were made by many students, with their results largely incorporated in a report by Davis (1975). The case for polyphase deformation in the Rincon Mountains is summarized by Drewes and Thorman (1978). Where thrust faulting was the ...
... 1974, 1977; Thorman and others, 1978). Detailed studies of small areas were made by many students, with their results largely incorporated in a report by Davis (1975). The case for polyphase deformation in the Rincon Mountains is summarized by Drewes and Thorman (1978). Where thrust faulting was the ...
In geologic terms, a plate is a large, rigid slab of solid rock
... What is a Tectonic Plate? A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Continental plates are those primarily covered by a landmass. They are less dense than the oceanic plates. ...
... What is a Tectonic Plate? A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Continental plates are those primarily covered by a landmass. They are less dense than the oceanic plates. ...
- Cuyuna Rock, Gem and Mineral Society
... Porphyry is a textural term for an igneous rock consisting of large-grained crystals such as feldspar or quartz dispersed in a fine-grained feldspathic matrix or groundmass. The larger crystals are called phenocrysts. The adjective porphyritic now refers to a certain texture of igneous rock regardle ...
... Porphyry is a textural term for an igneous rock consisting of large-grained crystals such as feldspar or quartz dispersed in a fine-grained feldspathic matrix or groundmass. The larger crystals are called phenocrysts. The adjective porphyritic now refers to a certain texture of igneous rock regardle ...
Chapter 21: Fossils and the Rock Record
... younger than the schist, because the granite cuts across the schist. In earthquake-prone areas, such as California, and in ancient, mountainous regions, such as the Adirondacks of New York, there are many faults. As you learned in Chapter 20, a fault is a fracture in Earth along which movement takes ...
... younger than the schist, because the granite cuts across the schist. In earthquake-prone areas, such as California, and in ancient, mountainous regions, such as the Adirondacks of New York, there are many faults. As you learned in Chapter 20, a fault is a fracture in Earth along which movement takes ...
NWGS NE WA
... deposition in shallow water. At this locality, the Stensgar is intruded by a diabase dike. Dikes and sills of this composition are common in the Deer Trail Group. The age of these sills is uncertain. Miller (1996) suggested that some of the sills could be lava flows, but conclusive evidence is lackin ...
... deposition in shallow water. At this locality, the Stensgar is intruded by a diabase dike. Dikes and sills of this composition are common in the Deer Trail Group. The age of these sills is uncertain. Miller (1996) suggested that some of the sills could be lava flows, but conclusive evidence is lackin ...
WASH Cluster – Emergency Training GWD
... Provide an understanding of how groundwater occurs in nature Examine how this can influence: • the location of potential groundwater sources, and • the means of developing the source ...
... Provide an understanding of how groundwater occurs in nature Examine how this can influence: • the location of potential groundwater sources, and • the means of developing the source ...
Presentation
... areas around the world, e.g.: • East and West coast of Australia, inland deposits in New South Wales and Victoria. „Parent“ rocks regarded as sources have a wide range in composition (mainly magmatic and metamorphic) and age (Archean to Phanerozoic). • Coastal areas in SW (Kerala), SE (Tamil Nadu) a ...
... areas around the world, e.g.: • East and West coast of Australia, inland deposits in New South Wales and Victoria. „Parent“ rocks regarded as sources have a wide range in composition (mainly magmatic and metamorphic) and age (Archean to Phanerozoic). • Coastal areas in SW (Kerala), SE (Tamil Nadu) a ...
replace this sentence with the title of your abstract
... South Pole-Aitken basin (SPA) excavated deep into the crust and, despite an extensive history of post-SPA impacts, the materials remaining in and around the SPA basin retain a record of the deep crustal composition (see below). This composition can be used to address key questions such as: (1) is th ...
... South Pole-Aitken basin (SPA) excavated deep into the crust and, despite an extensive history of post-SPA impacts, the materials remaining in and around the SPA basin retain a record of the deep crustal composition (see below). This composition can be used to address key questions such as: (1) is th ...
Algoman orogeny
The Algoman orogeny, known as the Kenoran orogeny in Canada, was an episode of mountain-building (orogeny) during the Late Archean Eon that involved repeated episodes of continental collisions, compressions and subductions. The Superior province and the Minnesota River Valley terrane collided about 2,700 to 2,500 million years ago. The collision folded the Earth's crust and produced enough heat and pressure to metamorphose the rock. Blocks were added to the Superior province along a 1,200 km (750 mi) boundary that stretches from present-day eastern South Dakota into the Lake Huron area. The Algoman orogeny brought the Archaen Eon to a close, about 2,500 million years ago; it lasted less than 100 million years and marks a major change in the development of the earth’s crust.The Canadian shield contains belts of metavolcanic and metasedimentary rocks formed by the action of metamorphism on volcanic and sedimentary rock. The areas between individual belts consist of granites or granitic gneisses that form fault zones. These two types of belts can be seen in the Wabigoon, Quetico and Wawa subprovinces; the Wabigoon and Wawa are of volcanic origin and the Quetico is of sedimentary origin. These three subprovinces lie linearly in southwestern- to northeastern-oriented belts about 140 km (90 mi) wide on the southern portion of the Superior Province.The Slave province and portions of the Nain province were also affected. Between about 2,000 and 1,700 million years ago these combined with the Sask and Wyoming cratons to form the first supercontinent, the Kenorland supercontinent.