Volcanoes are a natural way that the Earth and other planets have of cooling off. Planets are warm in their mantles. Heat inside planets escapes towards their surfaces. For reasons that are not well understood, heat sometimes melts rocks, which then rise buoyantly toward the planet's surface. When the hot rocks - called magma - and included gases break through the crust, an eruption occurs. The buildup of ash and lava flows around the eruption hole (or vent) makes a volcano.

No, and geologically there is no reason to expect one to appear. There is evidence, however, of multiple ash falls from ancient volcanoes preserved in rocks of Cambrian, Ordovician, and Devonian age in outcrops in eastern West Virginia and in the subsurface in the western part of the State, and in a flint clay in the Hernshaw coal bed of Middle Pennsylvanian age (Kanawha Formation) in southern West Virginia. See similar questions...

The turn off to the Mud Volcanoes is 38 km (check on GPS and include GPS map) short of Hingol River and is marked by a small blue sign (about 1 foot wide) saying “Sapt Post”. The color on the sign board will vary, but the road will take you straight to the coast guard camp at Sapt. Turn off the road at this sign towards the sea and follow the tracks. Here, a saying goes, “all tracks lead to Chandra Gupt. See similar questions...

Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup). It will rise to the surface or to a depth that is determined by the density of the magma and the weight of the rocks above it. As the magma rises, bubbles start to form from the gas dissolved in the magma. The gas bubbles exert tremendous pressure. See similar questions...

The absolute number of volcanoes that exists depends on your definition: active only, active, dormant plus extinct volcanoes? And even if we decide on a definition, nobody has really counted all of the volcanoes, especially the tens on thousands on the sea floor. The best guess is 1511 volcanoes have erupted in the last 10,000 years and should be considered active. See similar questions...

Alaska contains over 100 volcanoes and volcanic fields which have been active within the last one and a half million years. There are more then 70 potentially active volcanoes in Alaska. In the 1980's one morning of April 1st Sitka, Alaskans woke up to black smoke billowing out of the dormant volcano, Mt. Edgecombe; people were in a panic. The biggest joke had just been played on a whole town. See similar questions...

Call the USGS Cascades Volcano Observatory in Vancouver, Washington, at (360) 696-7693; the URL is http://vulcan.wr.usgs.gov. See similar questions...

Most of the Earth's volcanoes are located around the Pacific Ocean because that is where most of the Earth's subduction zones. A subduction zone is a place where one plate of oceanic lithosphere (= the crust + uppermost mantle) is shoved under another plate. The down going plate eventually starts to melt, and the material rises up to erupt through the overlying plate. If the overlying plate is a continent, you get a chain of volcanoes such as the Andes or Cascades. See similar questions...

Shield volcanoes--the largest of all volcanoes on Earth (not counting flood basalt flows). The Hawaiian volcanoes are the most famous examples. These volcanoes are mostly made up of basalt, a type of lava that is very fluid when erupted. For this reason these volcanoes are not steep (you can't pile up a fluid that easily runs downhill). See similar questions...

Kilauea, Hawaii; Mount St. See similar questions...

First, Netscape performed a careful analysis of all of the other free software licenses to determine what problems they solved and created. Then the company spent a good deal of time listening to experts and advocates in the free software community as well as to the public conversations about the freeing of the Communicator source. All of this input went into a draft license that went through extensive internal review and was posted to mozilla.org for review and comment by the general public. See similar questions...

Most of the art found here was created using the Solar System Simulator on Silicon Graphics workstations, with Adobe Photoshop, KPT Bryce, as well as Strata Studio and Lightwave on the Macintosh. See similar questions...

The Expect FAQ is regularly recreated by a Tcl script which produces either text or HTML depending on how it is called. Using Tcl has two nice results: I didn't have to choose one format and worry about converting it to the other. (Remember that the FAQ appears in HTML on the web and it appears in text in the Expect distribution.) The more common approach - doing conversions in either direction - is really painful - plus, it's now easy to generate other formats, too. See similar questions...

Congress, through the Maritime Transportation Security Act, or MTSA, directed the federal government to issue a biometric transportation security credential to any individual with unescorted access to secure areas of facilities and vessels and all mariners holding Coast Guard issued credentials or qualification documents. Controlling access to secure areas is a critical component of the Department of Homeland Security's (DHS) efforts to enhance port security. See similar questions...

Griggs Productions Inc., in conjunction with respected scholars, clinical psychologists, organizational development experts from major corporate entities and leaders in diversity designed this award winning program. See similar questions...

The About Apache document explains how the Apache project evolved from its beginnings as an outgrowth of the NCSA httpd project to its current status as one of the fastest, most efficient, and most functional web servers in existence. See similar questions...

Teams are created randomly every Fall. It has always been ALITHSA policy to keep the children on the same team from Fall to Spring. See similar questions...

Streamlining access to services and resources on the web is an important long-term strategic initiative identified by the college to better serve the campus community. The MyBCC portal helps to condense the vast number of forms, tools and applications provided to students and employees in an easy-to-use, secure format. The portal allows information to be customized so that it’s more efficient and relevant to each user. See similar questions...

Fa?ade was created over a period of 5 years primarily by two collaborators, Michael Mateas and Andrew Stern. We are each designer-programmers focused on researching and developing artificially intelligent art and entertainment. The production was an almost entirely self-funded, industry-academia collaboration: Andrew has 10+ years of game industry experience as a designer and AI engineer, and Michael creates AI-based art and is an Assistant Professor at the Georgia Institute of Technology. See similar questions...