PLATE TECTONICS
... • Dip indicates old magnetic pole position • Apparent motion of north magnetic pole through time Split in path indicates continents split apart Recent Evidence for Continental Drift • Fitting continents at continental slope rather than shoreline • Refined matches of rocks between continents • Isotop ...
... • Dip indicates old magnetic pole position • Apparent motion of north magnetic pole through time Split in path indicates continents split apart Recent Evidence for Continental Drift • Fitting continents at continental slope rather than shoreline • Refined matches of rocks between continents • Isotop ...
Volcanoes and Igneous Activity Earth
... movement is horizontal and parallel to the trend, or strike, of the fault surface. ...
... movement is horizontal and parallel to the trend, or strike, of the fault surface. ...
Slide 1
... They looked at maps and saw the continents looked like they fit together like a puzzle. They also found that there are similar rock types, deserts and fossils in the places where the continents look like they would join. ...
... They looked at maps and saw the continents looked like they fit together like a puzzle. They also found that there are similar rock types, deserts and fossils in the places where the continents look like they would join. ...
Northrop -
... Composed of igneous rock that formed as magma slowly cooled, these rocks originated far below a long-vanished mountain chain that stretched across the state. BENCHES Even at a distance, the rock's coarsely crystalline texture is apparent. 2ND Large crystals only form when magma cools very slowly. Th ...
... Composed of igneous rock that formed as magma slowly cooled, these rocks originated far below a long-vanished mountain chain that stretched across the state. BENCHES Even at a distance, the rock's coarsely crystalline texture is apparent. 2ND Large crystals only form when magma cools very slowly. Th ...
Geology and U-Pb geochronology of the Annidale Group, southern
... zones of extensive alteration characterized by the presence of carbonate, silica and chromium-rich micas in which numer ous significant gold and base metal occurrences have been identified. The central sequence, here termed the Lawson Brook Formation, is composed of felsic volcanic rocks, felsic mi ...
... zones of extensive alteration characterized by the presence of carbonate, silica and chromium-rich micas in which numer ous significant gold and base metal occurrences have been identified. The central sequence, here termed the Lawson Brook Formation, is composed of felsic volcanic rocks, felsic mi ...
Document
... Movement of particles as an S wave passes through can be best described as a. compression and extension in the direction of the wave movement b. compression and extension in a direction perpendicular to wave movement c. shear motion perpendicular to the direction of wave movement d. shear motion in ...
... Movement of particles as an S wave passes through can be best described as a. compression and extension in the direction of the wave movement b. compression and extension in a direction perpendicular to wave movement c. shear motion perpendicular to the direction of wave movement d. shear motion in ...
Precambrian stratigraphy of Manzanita and north Manzano
... This unit is estimated to be about 1,500 m thick. The basal 500 m and the upper 300 m are well exposed and in good stratigraphic order, but post-Precambrian faults and cover by Paleozoic strata make it difficult to obtain a precise measurement of the middle part of the greenstone sequence. The domin ...
... This unit is estimated to be about 1,500 m thick. The basal 500 m and the upper 300 m are well exposed and in good stratigraphic order, but post-Precambrian faults and cover by Paleozoic strata make it difficult to obtain a precise measurement of the middle part of the greenstone sequence. The domin ...
reconnaissance field study of the sarmiento ophiolite with emphasis
... The main ophiolitic units of the Rocas Verdes basin, called Sarmiento and Tortuga complexes, located north and south respectively (Fig. 1a), show contrasting petrological and chemical features suggesting that the Sarmiento complex represent a less developed stage of evolution than the Tortuga comple ...
... The main ophiolitic units of the Rocas Verdes basin, called Sarmiento and Tortuga complexes, located north and south respectively (Fig. 1a), show contrasting petrological and chemical features suggesting that the Sarmiento complex represent a less developed stage of evolution than the Tortuga comple ...
IGNEOUS ROCKS
... examination shows that Rhyolite is composed up of about 25 percent quartz whereas Andesite contains only minor amount of Quartz. ...
... examination shows that Rhyolite is composed up of about 25 percent quartz whereas Andesite contains only minor amount of Quartz. ...
Powerpoint Presentation Physical Geology, 10/e
... Geologic Structures • Geologic structures are dynamically-produced patterns or arrangements of rock or sediment that result from, and give information about, forces within the Earth – Produced as rocks change shape and orientation in response ...
... Geologic Structures • Geologic structures are dynamically-produced patterns or arrangements of rock or sediment that result from, and give information about, forces within the Earth – Produced as rocks change shape and orientation in response ...
Tectonic change 1 Powerpoint presentation
... Life started very early on in the Earth's history, although did not progress beyond simple single celled organisms for most of its history. It is likely that it thrived in pools of water near hydrothermal springs. The oldest `fossils' found date from 3550 million years ago in rocks from Western Aust ...
... Life started very early on in the Earth's history, although did not progress beyond simple single celled organisms for most of its history. It is likely that it thrived in pools of water near hydrothermal springs. The oldest `fossils' found date from 3550 million years ago in rocks from Western Aust ...
Outstanding geologic feature of Pennsylvania—Lehigh
... The scenic and rocky Lehigh Gorge winds through about 30 miles of the Anthracite Upland section of the Ridge and Valley physiographic province. The gorge can be traced from below the Francis E. Walter Dam to the cut through Bear Mountain, just downstream of Jim Thorpe, Pa. The Lehigh River drops ove ...
... The scenic and rocky Lehigh Gorge winds through about 30 miles of the Anthracite Upland section of the Ridge and Valley physiographic province. The gorge can be traced from below the Francis E. Walter Dam to the cut through Bear Mountain, just downstream of Jim Thorpe, Pa. The Lehigh River drops ove ...
The lithology, geochemistry, and metamorphic gradation of the
... part. This observation correlates with the courses of biotite and garnet isograds of the adjacent exposed areas (see Fig. 1). The delimited isograds and chlorite zone segments, situated W and SW of Cheb, form a symmetric NE–SW oriented ellipsoidal structure of regional metamorphism, with its axis pl ...
... part. This observation correlates with the courses of biotite and garnet isograds of the adjacent exposed areas (see Fig. 1). The delimited isograds and chlorite zone segments, situated W and SW of Cheb, form a symmetric NE–SW oriented ellipsoidal structure of regional metamorphism, with its axis pl ...
How do the Tectonic Plates on the Earth`s crust move ? The crust of
... which is mainly found beneath the oceans is made mostly from heavy basalt rock. Continental crust which is mainly dry land is formed predominantly from a lighter granite rock. Where both of these types of crust meet and push against each other, the heavier oceanic crust sinks underneath the lighter ...
... which is mainly found beneath the oceans is made mostly from heavy basalt rock. Continental crust which is mainly dry land is formed predominantly from a lighter granite rock. Where both of these types of crust meet and push against each other, the heavier oceanic crust sinks underneath the lighter ...
Earth 50: Plate Tectonics 9-25-06 Continental Drift James Hutton
... Benioff Zone: The zone from the trench to a depth of ~670 km in which earthquakes are associated with the subducting slab; deeper than this, flow between the slab and surrounding rocks is probably too plastic to generate earthquakes. In Continent-continent convergent margins, two continents collide. ...
... Benioff Zone: The zone from the trench to a depth of ~670 km in which earthquakes are associated with the subducting slab; deeper than this, flow between the slab and surrounding rocks is probably too plastic to generate earthquakes. In Continent-continent convergent margins, two continents collide. ...
A possible result of plates moving along a transform boundary is
... where does the hanging wall more relative to the footwall? ...
... where does the hanging wall more relative to the footwall? ...
Crust, Mantle, Core Review!
... Ocean crust is much denser than continental crust, however it is also much ____________ than continental crust. ...
... Ocean crust is much denser than continental crust, however it is also much ____________ than continental crust. ...
Earthquakes in NE Kansas
... closure of the MCR 1.1 billion year ago. Because rocks in the crust is lighter than those in the mantle, the surface of the Earth in this area has been moving upward since then. Most of the movement occur along the flanks of the rift, because the volcanic rocks along the rift axis are too heavy to m ...
... closure of the MCR 1.1 billion year ago. Because rocks in the crust is lighter than those in the mantle, the surface of the Earth in this area has been moving upward since then. Most of the movement occur along the flanks of the rift, because the volcanic rocks along the rift axis are too heavy to m ...
White et al Nice abstract
... Atlantic margins and discuss the temporal and spatial variations in the Iceland mantle plume in the early Tertiary, which have largely controlled this pattern of magmatism. Igneous rocks are added to the crust on rifted margins as extrusive lavas, as sills intruded into the sub-surface and as lower ...
... Atlantic margins and discuss the temporal and spatial variations in the Iceland mantle plume in the early Tertiary, which have largely controlled this pattern of magmatism. Igneous rocks are added to the crust on rifted margins as extrusive lavas, as sills intruded into the sub-surface and as lower ...
MRD 255 Metadata - Geology Ontario
... Official Name of the Data Set or Information Holding: Geochemical Data for Archean Volcanic Rocks, Whiskey Lake Greenstone Belt, District of Algoma, Ontario Acronyms are Used to Identify the Data Set or Information Holding: MRD255 Describe the Data Set or Information Holding: Byron, M., Whitehead, R ...
... Official Name of the Data Set or Information Holding: Geochemical Data for Archean Volcanic Rocks, Whiskey Lake Greenstone Belt, District of Algoma, Ontario Acronyms are Used to Identify the Data Set or Information Holding: MRD255 Describe the Data Set or Information Holding: Byron, M., Whitehead, R ...
Puerto-Rico Trench
... “earthquake zones” and most of these zones form bands or lines. • Scientists came to realize that these bands represent divisions in the lithosphere and separate it into pieces (plates). ...
... “earthquake zones” and most of these zones form bands or lines. • Scientists came to realize that these bands represent divisions in the lithosphere and separate it into pieces (plates). ...
Chemical Geology. 20(1977) 325-
... correspond to well-known and documented schemes that are in general use. The main rock series are divided into: (a) alkaline; and (b) subalkaline groups (Chayes, 1965; Wflkiuson, 1968) with the former comprising the alkali olivine-basalt series (Tilley, 1950) and shoshonite association (Joplin, 1965 ...
... correspond to well-known and documented schemes that are in general use. The main rock series are divided into: (a) alkaline; and (b) subalkaline groups (Chayes, 1965; Wflkiuson, 1968) with the former comprising the alkali olivine-basalt series (Tilley, 1950) and shoshonite association (Joplin, 1965 ...
Aim #9: Plate Tectonics Theory – Convergent
... into the Earth’s interior… Visualize what will happen to an oceanic plate as it sinks further and further below ...
... into the Earth’s interior… Visualize what will happen to an oceanic plate as it sinks further and further below ...
Rocks Chapter 4
... • Igneous rocks formed deep within the Earth are called intrusive. They form when magma forces its way upward into preexisting rocks and then hardens. Intrusive rocks include granite and pegmatite. Intrusive rocks are also known as plutonic rocks. A mass of intrusive rocks are known as a pluton. Plu ...
... • Igneous rocks formed deep within the Earth are called intrusive. They form when magma forces its way upward into preexisting rocks and then hardens. Intrusive rocks include granite and pegmatite. Intrusive rocks are also known as plutonic rocks. A mass of intrusive rocks are known as a pluton. Plu ...
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.