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2006-07-19 19:23:50 · 15 answers · asked by Tripal 1 in Science & Mathematics Astronomy & Space

15 answers

Mars is only about one-half the size of Earth and yet has several volcanoes that surpass the scale of the largest terrestrial volcanoes. The most massive volcanoes are located on huge uplifts or domes in the Tharsis and Elysium regions of Mars. The Tharsis dome is 4,000 kilometers (2,500 miles) across and rises to 10 kilometers (6.2 miles) in height. Located on its northwest flank are three large shield volcanoes: Ascraeus Mons, Pavonis Mons and Arsia Mons. Beyond the dome's northwest edge is Olympus Mons, the largest of the Tharsis volcanoes. Olympus Mons is classified as a shield volcano. It is 24 kilometers (15 miles) high, 550 kilometers (340 miles) in diameter and is rimmed by a 6 kilometers (4 miles) high scarp. It is one of the largest volcanoes in the Solar System. By comparison the largest volcano on Earth is Mauna Loa which is 9 kilometers (6 miles) high and 120 kilometers (75 miles) across.
Elysium Planitia is the second largest volcanic region on Mars. Elysium Planitia is centered on a broad dome that is 1,700 by 2,400 kilometers (1,060 by 1,490 miles) in size. It has smaller volcanoes than the Tharsis region, but a more diverse volcanic history. The three volcanoes include Hecates Tholus, Elysium Mons and Albor Tholus.

The large shield volcanoes on Mars resemble Hawaiian shield volcanoes. They both have effusive eruptions which are relatively quiet and basaltic in nature. Both have summit pits or calderas and long lava flows or channels. The biggest difference between Martian and Terrestrial volcanoes is size. The volcanoes in the Tharsis region are 10 to 100 times larger than those on Earth. They were built from large magma chambers deep within the Martian crust. The Martian flows are also much longer. This is probably due to larger eruption rates and to lower gravity. One of the reasons volcanoes of such magnitude were able to form on Mars is because the hot volcanic regions in the mantle remained fixed relative to the surface for hundreds of millions of years. On Earth, the tectonic flow of the crust across the hot volcanic regions prevent large volcanoes from forming. The Hawaiian islands were created as the Pacific plate moved northwest. These volcanoes have a relatively short life time. As the plate moves new volcanoes form and the old ones become silent.

Not all Martian volcanoes are classified as shields with effusive eruption styles. North of the Tharsis region lies Alba Patera. This volcano is comparable to Olympus Mons in its horizontal extent but not in height. Its base diameter is 1,500 kilometers (930 miles) but is less than 7 kilometers (4.3 miles) high. Ceraunius Tholus is one of the smaller volcanoes. It is about the size of the Big Island of Hawaii. It exhibits explosive eruption characteristics and probably consists of ash deposits. Tyrrhena Patera and Hadriaca Patera both have deeply eroded features which indicate explosive ash eruptions. Mt. Saint Helens is an example of a terrestrial ash eruption

2006-07-19 19:28:08 · answer #1 · answered by Bolan 6 · 1 0

Yes, I forget the name of it, but it is MUCH larger than mount Everest. There is a canyon that is about the size of the US too. Mars is able to have such large mountains and canyons because it is smaller that Earth, and thus doesn't have nearly the same amount of gravity, so volcanoes can get much larger and so can all of the geographic features.

2006-07-19 19:27:59 · answer #2 · answered by scottie2h2004 3 · 0 0

The last time I visited there I spotted abut 15 volcanoes and they were all right next to the beautiful beaches just like in the beautiful state of Hawaii

2006-07-19 19:27:12 · answer #3 · answered by philski333 5 · 0 0

There are volcanoes, just not any that are spewing anything interesting. Maybe we'll live to see a Mar's volcano eruption, that would be cool!!!

p.s. LEVEL THREE BABY!!!

2006-07-19 19:30:08 · answer #4 · answered by Anonymous · 0 0

yes there many volcanoes on mars . yet no active one are found. but there are several active volcanoes on jupiter

2006-07-19 20:38:12 · answer #5 · answered by jsid_cooldude 1 · 0 0

Yes - The largest known in the solar system Olympus Mons

2006-07-20 13:37:45 · answer #6 · answered by jdomanico 4 · 0 0

Hi,

They found out inactive valcanoes on Mars. Not active ones...

Karl
http://furl.net/members/internetweb

2006-07-20 03:53:57 · answer #7 · answered by Anonymous · 0 0

yes there r volcanoes on mars
cause it is ery hot planet i have read boks
it red planet

2006-07-19 19:45:21 · answer #8 · answered by Anonymous · 0 0

Olympus Mones is there, the largest in the solar system. I believe there are others as well

2006-07-19 20:54:49 · answer #9 · answered by Eric D Redd 2 · 0 0

Yes, but no active ones

2006-07-19 19:25:17 · answer #10 · answered by net_at_nite 4 · 0 0

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