1:500K Tectonic units of Western Australia
... 1000 Tectonic and magmatic events affecting the tectonic unit (ages in brackets indicate maximum and minimum age in millions of years) ...
... 1000 Tectonic and magmatic events affecting the tectonic unit (ages in brackets indicate maximum and minimum age in millions of years) ...
BILGERS ROCKS, CLEARFIELD COUNTY
... The rocks unit is the crossbedded “Homewood” sandstone of the Pottsville Formation. The sediment is fluvial in origin, deposited in the Pennsylvanian period over 300 million years ago. The sandstone is typically 20-25 feet thick. Joint separations vary from a few inches to as much as 15-20 feet. As ...
... The rocks unit is the crossbedded “Homewood” sandstone of the Pottsville Formation. The sediment is fluvial in origin, deposited in the Pennsylvanian period over 300 million years ago. The sandstone is typically 20-25 feet thick. Joint separations vary from a few inches to as much as 15-20 feet. As ...
Geologic History - Teacher Friendly Guides
... island arc and Marshfield terrane collided from the south, increasing the size of the Superior landmass (Figure 1.4). Erosion of the Penokean Mountains led to deposits of sandstone along the margin of a shallow sea. Around 1.7 billion years ago, after millions of years of heat and pressure, this san ...
... island arc and Marshfield terrane collided from the south, increasing the size of the Superior landmass (Figure 1.4). Erosion of the Penokean Mountains led to deposits of sandstone along the margin of a shallow sea. Around 1.7 billion years ago, after millions of years of heat and pressure, this san ...
Ontario geological map atlas: bedrock geology
... Mines (MNDM) as a public service, on an “as-is” basis. Recommendations and statements of opinion expressed in the Content are those of the author or authors and are not to be construed as statement of government policy. You are solely responsible for your use of the Content. You should not rely on t ...
... Mines (MNDM) as a public service, on an “as-is” basis. Recommendations and statements of opinion expressed in the Content are those of the author or authors and are not to be construed as statement of government policy. You are solely responsible for your use of the Content. You should not rely on t ...
Notes-Stress, Faults and Folds
... Rocks don’t always bend, sometimes they break. When the rock moves and breaks it is called a _______________. There are several different kinds of faults. There are two sides to a fault. The side that is above the fault plane is called the ____________________ ___________________. When the hanging ...
... Rocks don’t always bend, sometimes they break. When the rock moves and breaks it is called a _______________. There are several different kinds of faults. There are two sides to a fault. The side that is above the fault plane is called the ____________________ ___________________. When the hanging ...
Precambrian plate tectonics: Criteria and evidence
... and deformed within a Wilson cycle tend to be linear, in contrast to tectonic elements formed through non–plate tectonic processes, such as large igneous provinces, which tend to be more equidimensional. However, not all features generated through plate motion are unique to this process. For example ...
... and deformed within a Wilson cycle tend to be linear, in contrast to tectonic elements formed through non–plate tectonic processes, such as large igneous provinces, which tend to be more equidimensional. However, not all features generated through plate motion are unique to this process. For example ...
Continental like crust beneath the Andaman Island
... average crustal Vs ~3.6 km/s are much closer to the continental average than oceanic average, indicating intermediate bulk crustal composition and, (iii) presence of three characteristic layers within the crust as near-surface (2–6 km thick) sediment layer (Vs ~1.3–2.5 km/s), 12– 14 km thick upper l ...
... average crustal Vs ~3.6 km/s are much closer to the continental average than oceanic average, indicating intermediate bulk crustal composition and, (iii) presence of three characteristic layers within the crust as near-surface (2–6 km thick) sediment layer (Vs ~1.3–2.5 km/s), 12– 14 km thick upper l ...
Nugget
... volcanic successions. Ongoing Ar-Ar geochronology of lavas will further constrain depositional ages. ...
... volcanic successions. Ongoing Ar-Ar geochronology of lavas will further constrain depositional ages. ...
THE GEOLOGICAL MAP (1:25 000) OF THE SW PART OF
... the Isbjórnhamna Formation cannot be regarded as the crystalline basement of the remaining part of the Hecla Hoek Succession. Extent of the E i m f j e l l e t G r o u p has been here limited to the quartzite-amphibolite series of the southern tectonic block. Detailed mapping has allowed to present ...
... the Isbjórnhamna Formation cannot be regarded as the crystalline basement of the remaining part of the Hecla Hoek Succession. Extent of the E i m f j e l l e t G r o u p has been here limited to the quartzite-amphibolite series of the southern tectonic block. Detailed mapping has allowed to present ...
Pd Study Guide
... Convergent Boundary- Plates push together/collide (move toward each other) Divergent Boundary- Plates pull apart (move away from each other) Transform Boundary- Plates slide by each other ...
... Convergent Boundary- Plates push together/collide (move toward each other) Divergent Boundary- Plates pull apart (move away from each other) Transform Boundary- Plates slide by each other ...
Plate Tectonic Study Guide 2014-Answer Guide
... Convergent Boundary- Plates push together/collide (move toward each other) Divergent Boundary- Plates pull apart (move away from each other) Transform Boundary- Plates slide by each other ...
... Convergent Boundary- Plates push together/collide (move toward each other) Divergent Boundary- Plates pull apart (move away from each other) Transform Boundary- Plates slide by each other ...
ppt - SOEST
... low-grade metamorphosed. Blueschist: high-P, blue by glaucophane--amphibole (mafic rock) or blue by kyanite (pelite). ...
... low-grade metamorphosed. Blueschist: high-P, blue by glaucophane--amphibole (mafic rock) or blue by kyanite (pelite). ...
KEY How Earth`s Rocks Were Formed Three Families of Rocks A
... fragments, plant and animal remains, or chemicals). C. METAMORPHIC Rocks – formed when rocks that already exist are changed into new forms of rock (due to heat, pressure, chemicals and water). ...
... fragments, plant and animal remains, or chemicals). C. METAMORPHIC Rocks – formed when rocks that already exist are changed into new forms of rock (due to heat, pressure, chemicals and water). ...
Detrital sediments of the ca. 3.77 Ga Nuvvuagittuq Supracrustal Belt
... Nd/143Nd, indicative of an ancient (pre-4.28 Ga) source [3]. Other unusual geochemical characteristic of the Amc rocks include more variable concentrations of most major oxides (e.g. SiO2 ranges from 45- 60 wt.%; MgO 4-16 wt.%), elevated K2O, and lower FeO concentrations when compared to ‘normal’ ho ...
... Nd/143Nd, indicative of an ancient (pre-4.28 Ga) source [3]. Other unusual geochemical characteristic of the Amc rocks include more variable concentrations of most major oxides (e.g. SiO2 ranges from 45- 60 wt.%; MgO 4-16 wt.%), elevated K2O, and lower FeO concentrations when compared to ‘normal’ ho ...
ESC124 Chapter 3 Earth`s Materials
... • All matter, including minerals and rocks, made of atoms • Atom structure: Nucleus (proton and neutron) and surrounding electrons • Atomic number: The unique number of protons in an element’s nucleus • Atomic mass number: The sum of the number of protons and neutrons ...
... • All matter, including minerals and rocks, made of atoms • Atom structure: Nucleus (proton and neutron) and surrounding electrons • Atomic number: The unique number of protons in an element’s nucleus • Atomic mass number: The sum of the number of protons and neutrons ...
1 Possible Test Questions Unit 10 TECTONIC
... A. (page 17) The Earth consists of three concentric layers; this orderly division results from? ____ B. (Page 17) The mantle is thought to be composed of what dark, dense igneous rock? _____ C. (Page 31) Edward Suess in 1885 noted a common plant fossil (Glossopteris) on many continents. How did he p ...
... A. (page 17) The Earth consists of three concentric layers; this orderly division results from? ____ B. (Page 17) The mantle is thought to be composed of what dark, dense igneous rock? _____ C. (Page 31) Edward Suess in 1885 noted a common plant fossil (Glossopteris) on many continents. How did he p ...
the thin and solid outermost layer of Earth above the mantle
... a. a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle b. the boundary between two tectonic plates that are moving away from each other c. a break in a body of rock along which one block slides relative to another d. the bending of rock layers due to stress ...
... a. a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle b. the boundary between two tectonic plates that are moving away from each other c. a break in a body of rock along which one block slides relative to another d. the bending of rock layers due to stress ...
Isotope Geochemistry of the Continents
... reworking deeper crustal material that had never interacted with water at low temperatures. ...
... reworking deeper crustal material that had never interacted with water at low temperatures. ...
The Rock Cycle - opotikicollegeearthscience
... rock cycle all over again. • The term "metamorphic" means "to change form." Changes in the temperature and pressure conditions cause the minerals in the rock to become unstable so they either reorient themselves into layers (foliation) or recrystallize into larger crystals, all without undergoing me ...
... rock cycle all over again. • The term "metamorphic" means "to change form." Changes in the temperature and pressure conditions cause the minerals in the rock to become unstable so they either reorient themselves into layers (foliation) or recrystallize into larger crystals, all without undergoing me ...
Rocks
... Features of Sedimentary Rocks • Strata or beds—layers of accumulated sediment • Bedding planes—flat surfaces along which rocks tend to separate or break • Fossils ...
... Features of Sedimentary Rocks • Strata or beds—layers of accumulated sediment • Bedding planes—flat surfaces along which rocks tend to separate or break • Fossils ...
Lake Superior Provincial Park: On the geological shores of the
... The pictographs were painted using ochre, a natural earth pigment consisting mostly of hydrated iron oxide. The red ochre was mixed with oils from fish or animal fats to form an oily paste for painting. Possible sources of ochre sites are known near Gargantua Bay, 35 km to the northwest along the co ...
... The pictographs were painted using ochre, a natural earth pigment consisting mostly of hydrated iron oxide. The red ochre was mixed with oils from fish or animal fats to form an oily paste for painting. Possible sources of ochre sites are known near Gargantua Bay, 35 km to the northwest along the co ...
The Bassett Lake mafic intrusion is situated on and immediately
... mafic flows and minor volcanogenic sedimentary units. Rocks along the shores of Thorton Lake have been intensely sheared, and minor shearing occurs elsewhere in the volcanics, en echelon to the main shear zone. Contact relationships between the volcanic rocks and the gabbroic rocks of the Bassett La ...
... mafic flows and minor volcanogenic sedimentary units. Rocks along the shores of Thorton Lake have been intensely sheared, and minor shearing occurs elsewhere in the volcanics, en echelon to the main shear zone. Contact relationships between the volcanic rocks and the gabbroic rocks of the Bassett La ...
Great Lakes tectonic zone
The Great Lakes tectonic zone is bounded by South Dakota at its tip and heads northeast to south of Duluth, Minnesota, then heads east through northern Wisconsin, Marquette, Michigan, and then trends more northeasterly to skim the northern-most shores of lakes Michigan and Huron before ending in the Sudbury, Ontario, Canada, area.During the Late Archean Era the Algoman orogeny added landmass to the Superior province by volcanic activity and continental collision along a boundary that stretches from present-day South Dakota, U.S., into the Lake Huron region near Sudbury, Ontario, Canada.This crustal boundary is the Great Lakes tectonic zone. It is 1,400 km (870 mi) long, and separates the older Archean gneissic terrane to the south from younger Late Archean greenstone-granite terrane to the north.The zone is characterized by active compression during the Algoman orogeny (about 2,700 million years ago), a pulling-apart (extensional) tectonics (2,450 to 2,100 million years ago), a second compression during the Penokean orogeny (1,900 to 1,850 million years ago), a second extension during Middle Proterozoic time (1,600 million years ago) and minor reactivation during Phanerozoic time (the past 500 million years).Collision began along the Great Lakes tectonic zone (GLTZ) with the Algoman mountain-building event and continued for tens of millions of years. During the formation of the GLTZ, the gneissic Minnesota River Valley subprovince was thrust up onto the Superior province's edge as it consumed the Superior province's oceanic crust. Fragmentation of the Kenorland supercontinent began 2,450 million years ago and was completed by 2,100 million years ago. The Wyoming province is the continental landmass that is hypothesized to have rifted away from the southern Superior province portion of Kenorland, before moving rapidly west and docking with the Laurentia supercontinent 1,850 to 1,715 million years ago. Sedimentation from the GLTZ-rifting environment continued into the Penokean orogeny, which is the next major tectonic event in the Great Lakes region. Several earthquakes have been documented in Minnesota, Michigan's Upper Peninsula and Sudbury in the last 120 years along the GLTZ.