View PDF - Goldschmidt Conference Archive
... isotope compositions, different from those of the normal mantle zircon, and contain residual crustal zircons. These geochemical features indicate that the two types of mafic igneous rocks were originated from the different natures of mantle sources. The mantle source for the second type of rocks wou ...
... isotope compositions, different from those of the normal mantle zircon, and contain residual crustal zircons. These geochemical features indicate that the two types of mafic igneous rocks were originated from the different natures of mantle sources. The mantle source for the second type of rocks wou ...
forms of intrusive igneous rocks
... overlying sediment column. • Since basic magma are more fluid then acidic magmamostly sills are made up of gabbros, dolerites and basalts ...
... overlying sediment column. • Since basic magma are more fluid then acidic magmamostly sills are made up of gabbros, dolerites and basalts ...
Rock cycle and Igneous rocks
... Obsidian is usually black in color though it can also be red or have a greenish tint. It is a dense volcanic glass, usually composed of rhyolite, rich in iron and magnesium. Obsidian is formed when the lava cools so quickly that crystals do not have time to grow. Obsidian fractures with very sharp e ...
... Obsidian is usually black in color though it can also be red or have a greenish tint. It is a dense volcanic glass, usually composed of rhyolite, rich in iron and magnesium. Obsidian is formed when the lava cools so quickly that crystals do not have time to grow. Obsidian fractures with very sharp e ...
PETROLOGY - Universitas Muhammadiyah Surakarta
... • Usually dark in color (dark gray to black) • Characteristic of Earth's oceanic crust, Hawaiian volcanoes • Forms a runny (low viscosity) lava • Rock types include: Basalt, Gabbro ...
... • Usually dark in color (dark gray to black) • Characteristic of Earth's oceanic crust, Hawaiian volcanoes • Forms a runny (low viscosity) lava • Rock types include: Basalt, Gabbro ...
IGNEOUS ROCKS
... – DIKE• If no layering in country rock • If country rock is layered- Discordant – SILL- less common • Concordant- parallel to layering in country rock Pluton BATHOLITH– Large intrusive body – Exposed in an area greater than 100 square Km. – Coalesced smaller plutons smaller bodies are called STOCKS ...
... – DIKE• If no layering in country rock • If country rock is layered- Discordant – SILL- less common • Concordant- parallel to layering in country rock Pluton BATHOLITH– Large intrusive body – Exposed in an area greater than 100 square Km. – Coalesced smaller plutons smaller bodies are called STOCKS ...
Igneous Rock
... How are igneous rock classified? Like all other rock, igneous rock is classified ...
... How are igneous rock classified? Like all other rock, igneous rock is classified ...
Igneous Rock Features - Choteau Schools-
... Igneous rocks are classified into two areas depending on where thy formed. ...
... Igneous rocks are classified into two areas depending on where thy formed. ...
Igneous Rock PPT - Effingham County Schools
... ◦ WHY? The inside of the Earth is VERY hot! Therefore, the magma cools slowly creating larger crystals ...
... ◦ WHY? The inside of the Earth is VERY hot! Therefore, the magma cools slowly creating larger crystals ...
Introduction to Earth Science Ch. 01
... Intrusive Igneous Activity • Plutons result from the cooling and hardening of magma within the earth • Exposed at surface after uplift and erosion • Pluton refers to Pluto, the Roman god of the underworld ...
... Intrusive Igneous Activity • Plutons result from the cooling and hardening of magma within the earth • Exposed at surface after uplift and erosion • Pluton refers to Pluto, the Roman god of the underworld ...
Lecture 2b: Hot spots
... A large summit caldera develops when the roof collapses into a shallow (<1 km below summit) magma chamber. Most lavas ascend to this summit magma chamber and degas and differentiate there, even if they erupt down on the… Rift zones that develop when gravitational stresses and push from intruding ...
... A large summit caldera develops when the roof collapses into a shallow (<1 km below summit) magma chamber. Most lavas ascend to this summit magma chamber and degas and differentiate there, even if they erupt down on the… Rift zones that develop when gravitational stresses and push from intruding ...
Powerpoint template for scientific poster
... The mantle plume theory, or Yellowstone Hotspot theory, suggests that the source of the eruptions are from a mantle plume, possibly the hotspot that now rests underneath Yellowstone National Park. This hotspot did indeed move through the general area across the Snake River plain around the time the ...
... The mantle plume theory, or Yellowstone Hotspot theory, suggests that the source of the eruptions are from a mantle plume, possibly the hotspot that now rests underneath Yellowstone National Park. This hotspot did indeed move through the general area across the Snake River plain around the time the ...
IGNEOUS ROCKS - Sri Venkateswara College of Engineering
... • When the molten magma goes out as volcano and then solidify is known as extrusive igneous rock. • It cools relatively fast. • It has high temperature and pressure. ...
... • When the molten magma goes out as volcano and then solidify is known as extrusive igneous rock. • It cools relatively fast. • It has high temperature and pressure. ...
Igneous rock notes key
... Name of intrusive igneous rock based on Large size and irregularshape of the intrusive body ...
... Name of intrusive igneous rock based on Large size and irregularshape of the intrusive body ...
English 301 definitions assignment
... processes occur at mid-ocean ridges and how much of the ocean floor is formed. At mid-ocean ridges, magma is erupted underwater and is mixed with the sediments on the ocean floor which creates layers in the rock (figure 1) throughout the eruption and deposition stages. The base of the ophiolite cons ...
... processes occur at mid-ocean ridges and how much of the ocean floor is formed. At mid-ocean ridges, magma is erupted underwater and is mixed with the sediments on the ocean floor which creates layers in the rock (figure 1) throughout the eruption and deposition stages. The base of the ophiolite cons ...
Intrusive Activity and the Igneous Rocks
... coarse grained) to porphyritic textures, compared to the porphyritic to aphinitic textures of extrusive igneous rocks. Felsic (60-75% silica, with “free” quartz) composition dominates the intrusive or plutonic rocks (e.g., granites and granodiorites), compared to the mafic (with ~50% silica, no “fre ...
... coarse grained) to porphyritic textures, compared to the porphyritic to aphinitic textures of extrusive igneous rocks. Felsic (60-75% silica, with “free” quartz) composition dominates the intrusive or plutonic rocks (e.g., granites and granodiorites), compared to the mafic (with ~50% silica, no “fre ...
G: Glossary
... Southern Hemisphere, also called Gondwanaland. The preponderance of modem evidence indicates that the present continents are fragments which have been separated from each other by some form of continental displacement with the aid of seafloor spreading. Granitic: A term used to describe light-colore ...
... Southern Hemisphere, also called Gondwanaland. The preponderance of modem evidence indicates that the present continents are fragments which have been separated from each other by some form of continental displacement with the aid of seafloor spreading. Granitic: A term used to describe light-colore ...
Earth Science Chapter 6
... Metamorphic Rocks: form from the effect of heat and pressure on other rocks. The Rock Cycle is the repeated series of events by which rocks gradually and continually change from one form to another. ...
... Metamorphic Rocks: form from the effect of heat and pressure on other rocks. The Rock Cycle is the repeated series of events by which rocks gradually and continually change from one form to another. ...
IGNEOUS ROCK ASSOCIATIONS
... serpetinized, porphyritic, phlogopite peridotites non-orogenic parts of continental platforms vertical pipes <0.5 Km2 scattered over a given large area. originate >100 km in the mantle ...
... serpetinized, porphyritic, phlogopite peridotites non-orogenic parts of continental platforms vertical pipes <0.5 Km2 scattered over a given large area. originate >100 km in the mantle ...
Faults - Geology
... earth’s crust where movement has occurred. There are three types: normal, reverse or thrust, and strike-slip (also called transcurrent). ...
... earth’s crust where movement has occurred. There are three types: normal, reverse or thrust, and strike-slip (also called transcurrent). ...
Igneous Rock
... • Formed from lava at the surface • When lava cools at the surface, it is exposed to air and water and cools quickly • Quick cooling prevents mineral grains from growing large ...
... • Formed from lava at the surface • When lava cools at the surface, it is exposed to air and water and cools quickly • Quick cooling prevents mineral grains from growing large ...
Igneous Rocks: Notes Outline
... 2. “Ooze” out of a volcano – 3. Get trapped somewhere on the way up to the surface - ...
... 2. “Ooze” out of a volcano – 3. Get trapped somewhere on the way up to the surface - ...
Igneous Rocks
... Igneous Rocks Magma forms when rock in the Earth partially melts. This can occur during the following conditions: a. Pressure decreases b. Volatiles are added c. ...
... Igneous Rocks Magma forms when rock in the Earth partially melts. This can occur during the following conditions: a. Pressure decreases b. Volatiles are added c. ...
Mackenzie Large Igneous Province
The Mackenzie Large Igneous Province (MLIP) is a major Mesoproterozoic large igneous province of the southwestern, western and northwestern Canadian Shield in Canada. It consists of a group of related igneous rocks that were formed during a massive igneous event starting about 1,270 million years ago. The large igneous province extends from the Arctic in Nunavut to near the Great Lakes in Northwestern Ontario where it meets with the smaller Matachewan dike swarm. Included in the Mackenzie Large Igneous Province are the large Muskox layered intrusion, the Coppermine River flood basalt sequence and the massive northwesterly trending Mackenzie dike swarm.As a large igneous province, it is an extremely large area of related igneous rocks that were emplaced over an extremely short geological time span. The igneous rocks comprising the Mackenzie Large Igneous Province originated from processes not associated with normal plate tectonics and seafloor spreading. It is one of the several large igneous provinces scattered throughout the Canadian landscape, which can be thousands of kilometres in volume and area. The Mackenzie Large Igneous Province is also one of the largest Proterozoic magmatic provinces on Earth, as well as the world's largest and best-preserved continental flood basalt terrain. Igneous rocks of the Mackenzie Large Igneous Province are generally mafic in composition, including basalt and gabbro.Even though the Mackenzie Large Igneous Province is classified as a large igneous province like other extremely large accumulations of igneous rocks on Earth, it is much larger than large igneous province standards. The standard size classification for large igneous provinces is a minimum areal extent of 100,000 km2 (39,000 sq mi). However, the Mackenzie dike swarm itself occupies an area of at least 2,700,000 km2 (1,000,000 sq mi), making the Mackenzie Large Igneous Province larger than the Ontong Java Plateau in the southwestern Pacific Ocean and the U.S. state of Alaska.