Tholeiitic Basalt

Are SCALAR WEAPONS Being used on the HEKLA Volcano Iceland

Duration: 3:36
Published: 2010-12-03
Uploaded: 2010-12-04
Author: ChristiannaGarrett1

SCALAR Technology: www.angelfire.com - HEKLA - www.volcano.si.edu 'One of Iceland's most prominent and active volcanoes, Hekla lies near the southern end of the eastern rift zone. Hekla occupies a rift-transform junction, and has produced basaltic andesites, in contrast to the tholeiitic basalts typical of Icelandic rift zone volcanoes. Vatnafjöll, a 40-km-long, 9-km-wide group of basaltic fissures and crater rows immediately SE of Hekla forms a part of the Hekla-Vatnafjöll volcanic system. A 5.5-km-long fissure, Heklugjá, cuts across the 1491-m-high Hekla volcano and is often active along its full length during major eruptions. Repeated eruptions along this rift, which is oblique to most rifting structures in the eastern volcanic zone, are responsible for Hekla's elongated ENE-WSW profile. Frequent large silicic explosive eruptions during historical time have deposited tephra throughout Iceland, providing valuable time markers used to date eruptions from other Icelandic volcanoes. Hekla tephras are generally rich in fluorine and are consequently very hazardous to grazing animals. Extensive lava flows from Hekla's historical eruptions, which date back to 1104 AD, cover much of the volcano's flanks'. TWITTER -DIGG - Buzz - Google - Delicious - Fark - Stumbleupon - Latest Volcano News - Latest News - Breaking News - Newsitemstoday.com Copyright Free Music: The.Spirit.Of.Light » "Surprise Me"

Halona Kahakai, Hawaii Volcanoes National Park

Duration: 2:33
Published: 2008-09-01
Uploaded: 2010-08-14
Author: DrBlizzardo

The pullout at Halona Kahakai is at very near the crest of the Holei Pali fault escarpment. In Hawaiian, "Pali" means cliff. The viscosity of flowing oceanic tholeiite basalt, the lava that built Kilauea, is such that when it cools, rarely do slopes exceed a 6% grade. Any landform that is much steeper, such as the Holei Pali as seen from Halona Kahakai and the Hilina Pali directly north, generally has to have formed by faulting or erosion. In this case, Holei Pali results from what are called "normal faults". All of the lava plain spread before you down below the pali has simply broken off the main slope and dropped. There is an amazing amount of throw on these faults, in places, as much as 1400 feet. Although appearing "volcano tough" to the casual observer, the Islands of Hawaii are terribly, terribly fragile constructions and, geologically speaking, don't last very long. Stop and take a moment to look down the pali. Generally, the explosion cloud from where the lava is entering the ocean is visible south east from here. Look at the intertwining lava flows marching across the plain below you and imagine what it must have been like to be here, only a few decades ago, when the lava was coursing down this cliff and through the now largely-destroyed Naulu Forest.

Halona Kahakai, Hawaii Volcanoes National Park

Duration: 2:38
Published: 2008-11-08
Uploaded: 2010-03-02
Author: DrBlizzardo

The pullout at Halona Kahakai is at very near the crest of the Holei Pali fault escarpment. In Hawaiian, "Pali" means cliff. The viscosity of flowing oceanic tholeiite basalt, the lava that built Kilauea, is such that when it cools, rarely do slopes exceed a 6% grade. Any landform that is much steeper, such as the Holei Pali as seen from Halona Kahakai and the Hilina Pali directly north, generally has to have formed by faulting or erosion. In this case, Holei Pali results from what are called "normal faults". All of the lava plain spread before you down below the pali has simply broken off the main slope and dropped. There is an amazing amount of throw on these faults, in places, as much as 1400 feet. Although appearing "volcano tough" to the casual observer, the Islands of Hawaii are terribly, terribly fragile constructions and, geologically speaking, don't last very long. Stop and take a moment to look down the pali. Generally, the explosion cloud from where the lava is entering the ocean is visible south east from here. Look at the intertwining lava flows marching across the plain below you and imagine what it must have been like to be here, only a few decades ago, when the lava was coursing down this cliff and through the now largely-destroyed Naulu Forest. Video written andproduced by Donald B. MacGowan; videography by Frank Burgess and Donald MacGowan; Narrated by Frank Burgess, Original music written and performed by Donnie MacGowan. For more information about ...

Halona Kahakai, Hawaii Volcanoes National Park

Duration: 2:33
Published: 2008-10-15
Uploaded: 2010-04-23
Author: DrBlizzardo

The pullout at Halona Kahakai is at very near the crest of the Holei Pali fault escarpment. In Hawaiian, "Pali" means cliff. The viscosity of flowing oceanic tholeiite basalt, the lava that built Kilauea, is such that when it cools, rarely do slopes exceed a 6% grade. Any landform that is much steeper, such as the Holei Pali as seen from Halona Kahakai and the Hilina Pali directly north, generally has to have formed by faulting or erosion. In this case, Holei Pali results from what are called "normal faults". All of the lava plain spread before you down below the pali has simply broken off the main slope and dropped. There is an amazing amount of throw on these faults, in places, as much as 1400 feet. Although appearing "volcano tough" to the casual observer, the Islands of Hawaii are terribly, terribly fragile constructions and, geologically speaking, don't last very long. Stop and take a moment to look down the pali. Generally, the explosion cloud from where the lava is entering the ocean is visible south east from here. Look at the intertwining lava flows marching across the plain below you and imagine what it must have been like to be here, only a few decades ago, when the lava was coursing down this cliff and through the now largely-destroyed Naulu Forest. Written, filmed and produced by Donnie MacGowan and Frank Burgess, original musical score by Donald B. MacGowan. For more information on touring Hawaii in general and the Big Island in particular, please visit www ...

Halona Kahakai, Hawaii Volcanoes National Park

Duration: 1:27
Published: 2010-08-20
Uploaded: 2010-08-21
Author: DrBlizzardo

Written and Produced by Donald B. MacGowan Narrated by Donald B. MacGowan Video and still photography by Donnie MacGowan The pullout at Halona Kahakai is at very near the crest of the Holei Pali fault escarpment. In Hawaiian, "pali" means cliff. The viscosity and angle of repose of flowing oceanic tholeiite basalt, the lava that built Kilauea, is such that when it cools, rarely do slopes exceed a 6% grade. Any landform that is much steeper, such as the Holei Pali as seen from Halona Kahakai and the Hilina Pali directly north, generally has to have formed either by faulting or erosion. In this case, Holei Pali results from what are called "normal faults". All of the lava plain spread before you down below the escarpment has simply broken off the main slope and dropped. There is an amazing amount of throw on these faults, in places, as much as 1400 feet. Although appearing "volcano tough" to the casual observer, the Islands of Hawaii are terribly, terribly fragile constructions and, geologically speaking, don't last very long. So stop and take a moment to look down the pali. Generally, the explosion cloud from where the lava is entering the ocean is visible south east from here. Look at the intertwining lava flows marching across the plain below you and imagine what it must have been like to be here, only a few decades ago, when the lava was coursing down this cliff and through the now largely-destroyed Naulu Forest.

NCGS Smartville Complex Field Trip by Dr. Eldridge M. Moores Stop 2 (part 1 of 4)

Duration: 10:30
Published: 2010-09-19
Uploaded: 2010-09-26
Author: NCGSFieldTrips

Dr. Eldridge Moores introduces the ophiolite field trip at pillow basalt Stop 2 NORTHERN CALIFORNIA GEOLOGICAL SOCIETY FIELD TRIP - Saturday, September 18, 2010, "GEOLOGY AND TECTONICS OF THE SMARTVILLE COMPLEX, NW SIERRA NEVADA, CALIFORNIA", Leader: Dr. Eldridge M. Moores, Distinguished Professor Emeritus, University of California, Davis Abstract The Smartville Complex comprises a north-trending submarine intrusive-extrusive (ophiolitic) complex, approximately 100km long by 40km wide in the northwestern Sierra Nevada Foothills. Generally from bottom to top, rocks comprise serpentinite (a few exposures), olivine gabbro, and layered gabbro, varitextured massive pyroxene and hornblende gabbro, plagiogranite, massive diabase, sheeted diabase, pillow lava, and volcaniclastic sediments. A few massive sulfide deposits are present in the volcaniclastic sediments. Rocks range from nearly undeformed--perhaps the best-preserved sheeted dikes and pillow lavas in North America--to highly schistose. Structure is complex, but rocks describe approximately a north-trending antiform that structurally overlies mélange and associated sediments of the Central Belt of the Sierra Nevada. Dikes intrude both igneous rocks and here and there Central Belt sedimentary rocks. Dikes are mostly north-trending, but curve to NE-trending towards the N. In places (Stanfield Hill, Marysville Road) the dikes are nearly undeformed, trending NNW and dipping steeply E. In other places, eg in Auburn, Oroville ...

NCGS Smartville Complex Field Trip by Dr. Eldridge Moores Stop 2 (part 2 of 4)

Duration: 10:30
Published: 2010-09-19
Uploaded: 2010-09-26
Author: NCGSFieldTrips

Dr. Eldridge Moores introduces the ophiolite field trip at pillow basalt Stop 2 NORTHERN CALIFORNIA GEOLOGICAL SOCIETY FIELD TRIP - Saturday, September 18, 2010, "GEOLOGY AND TECTONICS OF THE SMARTVILLE COMPLEX, NW SIERRA NEVADA, CALIFORNIA", Leader: Dr. Eldridge Moores, Distinguished Professor Emeritus, University of California, Davis Abstract The Smartville Complex comprises a north-trending submarine intrusive-extrusive (ophiolitic) complex, approximately 100km long by 40km wide in the northwestern Sierra Nevada Foothills. Generally from bottom to top, rocks comprise serpentinite (a few exposures), olivine gabbro, and layered gabbro, varitextured massive pyroxene and hornblende gabbro, plagiogranite, massive diabase, sheeted diabase, pillow lava, and volcaniclastic sediments. A few massive sulfide deposits are present in the volcaniclastic sediments. Rocks range from nearly undeformed--perhaps the best-preserved sheeted dikes and pillow lavas in North America--to highly schistose. Structure is complex, but rocks describe approximately a north-trending antiform that structurally overlies mélange and associated sediments of the Central Belt of the Sierra Nevada. Dikes intrude both igneous rocks and here and there Central Belt sedimentary rocks. Dikes are mostly north-trending, but curve to NE-trending towards the N. In places (Stanfield Hill, Marysville Road) the dikes are nearly undeformed, trending NNW and dipping steeply E. In other places, eg in Auburn, Oroville Dam ...

NCGS Smartville Complex Field Trip by Dr. Eldridge Moores Stop 2 (part 3 of 4)

Duration: 9:28
Published: 2010-09-20
Uploaded: 2010-09-26
Author: NCGSFieldTrips

Dr. Eldridge Moores introduces the ophiolite field trip at pillow basalt Stop 2 NORTHERN CALIFORNIA GEOLOGICAL SOCIETY FIELD TRIP - Saturday, September 18, 2010, "GEOLOGY AND TECTONICS OF THE SMARTVILLE COMPLEX, NW SIERRA NEVADA, CALIFORNIA", Leader: Dr. Eldridge Moores, Distinguished Professor Emeritus, University of California, Davis Abstract The Smartville Complex comprises a north-trending submarine intrusive-extrusive (ophiolitic) complex, approximately 100km long by 40km wide in the northwestern Sierra Nevada Foothills. Generally from bottom to top, rocks comprise serpentinite (a few exposures), olivine gabbro, and layered gabbro, varitextured massive pyroxene and hornblende gabbro, plagiogranite, massive diabase, sheeted diabase, pillow lava, and volcaniclastic sediments. A few massive sulfide deposits are present in the volcaniclastic sediments. Rocks range from nearly undeformed--perhaps the best-preserved sheeted dikes and pillow lavas in North America--to highly schistose. Structure is complex, but rocks describe approximately a north-trending antiform that structurally overlies mélange and associated sediments of the Central Belt of the Sierra Nevada. Dikes intrude both igneous rocks and here and there Central Belt sedimentary rocks. Dikes are mostly north-trending, but curve to NE-trending towards the N. In places (Stanfield Hill, Marysville Road) the dikes are nearly undeformed, trending NNW and dipping steeply E. In other places, eg in Auburn, Oroville Dam ...

NCGS Smartville Complex Field Trip by Dr. Eldridge Moores Stop 2 (part 4 of 4)

Duration: 5:30
Published: 2010-09-23
Uploaded: 2010-09-26
Author: NCGSFieldTrips

Dr. Eldridge Moores shows pillow basalts Stop 2 NORTHERN CALIFORNIA GEOLOGICAL SOCIETY FIELD TRIP - Saturday, September 18, 2010, "GEOLOGY AND TECTONICS OF THE SMARTVILLE COMPLEX, NW SIERRA NEVADA, CALIFORNIA", Leader: Dr. Eldridge M. Moores, Distinguished Professor Emeritus, University of California, Davis Abstract The Smartville Complex comprises a north-trending submarine intrusive-extrusive (ophiolitic) complex, approximately 100km long by 40km wide in the northwestern Sierra Nevada Foothills. Generally from bottom to top, rocks comprise serpentinite (a few exposures), olivine gabbro, and layered gabbro, varitextured massive pyroxene and hornblende gabbro, plagiogranite, massive diabase, sheeted diabase, pillow lava, and volcaniclastic sediments. A few massive sulfide deposits are present in the volcaniclastic sediments. Rocks range from nearly undeformed--perhaps the best-preserved sheeted dikes and pillow lavas in North America--to highly schistose. Structure is complex, but rocks describe approximately a north-trending antiform that structurally overlies mélange and associated sediments of the Central Belt of the Sierra Nevada. Dikes intrude both igneous rocks and here and there Central Belt sedimentary rocks. Dikes are mostly north-trending, but curve to NE-trending towards the N. In places (Stanfield Hill, Marysville Road) the dikes are nearly undeformed, trending NNW and dipping steeply E. In other places, eg in Auburn, Oroville Dam south abutment, and along the ...

NCGS Smartville Complex Field Trip by Dr. Eldridge Moores Stop 3 (part 1 of 2)

Duration: 8:32
Published: 2010-09-23
Uploaded: 2010-09-26
Author: NCGSFieldTrips

Dr. Eldridge Moores and Dan Day (1977 UC-Davis MS Thesis Study Area) describes sheeted dikes at Stop 3 NORTHERN CALIFORNIA GEOLOGICAL SOCIETY FIELD TRIP - Saturday, September 18, 2010, "GEOLOGY AND TECTONICS OF THE SMARTVILLE COMPLEX, NW SIERRA NEVADA, CALIFORNIA", Leader: Dr. Eldridge M. Moores, Distinguished Professor Emeritus, University of California, Davis Abstract The Smartville Complex comprises a north-trending submarine intrusive-extrusive (ophiolitic) complex, approximately 100km long by 40km wide in the northwestern Sierra Nevada Foothills. Generally from bottom to top, rocks comprise serpentinite (a few exposures), olivine gabbro, and layered gabbro, varitextured massive pyroxene and hornblende gabbro, plagiogranite, massive diabase, sheeted diabase, pillow lava, and volcaniclastic sediments. A few massive sulfide deposits are present in the volcaniclastic sediments. Rocks range from nearly undeformed--perhaps the best-preserved sheeted dikes and pillow lavas in North America--to highly schistose. Structure is complex, but rocks describe approximately a north-trending antiform that structurally overlies mélange and associated sediments of the Central Belt of the Sierra Nevada. Dikes intrude both igneous rocks and here and there Central Belt sedimentary rocks. Dikes are mostly north-trending, but curve to NE-trending towards the N. In places (Stanfield Hill, Marysville Road) the dikes are nearly undeformed, trending NNW and dipping steeply E. In other places ...

NCGS Smartville Complex Field Trip by Dr. Eldridge Moores Stop 3 (part 2 of 2)

Duration: 4:01
Published: 2010-09-23
Uploaded: 2010-09-26
Author: NCGSFieldTrips

Dr. Eldridge Moores and Dan Day (1977 UC-Davis MS Thesis Study Area) describes sheeted dikes at Stop 3 NORTHERN CALIFORNIA GEOLOGICAL SOCIETY FIELD TRIP - Saturday, September 18, 2010, "GEOLOGY AND TECTONICS OF THE SMARTVILLE COMPLEX, NW SIERRA NEVADA, CALIFORNIA", Leader: Dr. Eldridge M. Moores, Distinguished Professor Emeritus, University of California, Davis Abstract The Smartville Complex comprises a north-trending submarine intrusive-extrusive (ophiolitic) complex, approximately 100km long by 40km wide in the northwestern Sierra Nevada Foothills. Generally from bottom to top, rocks comprise serpentinite (a few exposures), olivine gabbro, and layered gabbro, varitextured massive pyroxene and hornblende gabbro, plagiogranite, massive diabase, sheeted diabase, pillow lava, and volcaniclastic sediments. A few massive sulfide deposits are present in the volcaniclastic sediments. Rocks range from nearly undeformed--perhaps the best-preserved sheeted dikes and pillow lavas in North America--to highly schistose. Structure is complex, but rocks describe approximately a north-trending antiform that structurally overlies mélange and associated sediments of the Central Belt of the Sierra Nevada. Dikes intrude both igneous rocks and here and there Central Belt sedimentary rocks. Dikes are mostly north-trending, but curve to NE-trending towards the N. In places (Stanfield Hill, Marysville Road) the dikes are nearly undeformed, trending NNW and dipping steeply E. In other places ...

Tholeiitic basalt

See also

References