[DOC] [TLE] Caldera: Crater Formed by Volcanic Collapse or Explosion [PAR] Crater Lake Caldera: A satellite view of Crater Lake, one of the world's most 
famous calderas. ... Fountains of pumice and ash surrounded the collapsing 
summit, and ... One of these eruptions produced a caldera about 50 miles across 
that... [DOC] [TLE] Mount Mazama and Crater Lake: Growth and Destruction of a ... [PAR] Sep 27, 2002 ... After the collapse of the summit of the volcano, the caldera filled with water to ... 
Layers of lava flows from these volcanoes are visible in the caldera walls and in 
... During one such eruption about 7,900 years ago, the white layer of ... Since 
that time, the volcano has remained quiet, allowing as much as 100... [DOC] [TLE] GEOL205: Eruption Processes [PAR] Many of these flows were emplaced on top of each other, giving the ... days, 
weeks, months, years, or decades remains one the great mysteries of Kilauea. ... 
by abrupt collapses of the summit - forming calderas such as the one present 
today. [DOC] [TLE] Nemrut (volcano) - Wikipedia [PAR] Nemrut is a dormant volcano in Eastern Turkey, close to Lake Van. The volcano 
is named after King Nimrod who is said to have ruled this area in about 2100 BC. 
The most powerful eruptions of Nemrut occurred in the Pleistocene. Many small 
eruptions occurred during the Holocene, the last one in 1692. ... It is the 
westernmost of these volcanoes, the only one that remains active,... [DOC] [TLE] Caldera - Wikipedia [PAR] A caldera is a large cauldron-like depression that forms following the evacuation 
of a magma chamber/reservoir. When large volumes of magma are erupted over 
a short time period structural support for the crust above the magma chamber is 
lost. The ground surface then collapses downward into the partially emptied .... 
More than 80 of these large shield volcanoes have summit calderas... [DOC] [TLE] Calderas [PAR] These volcanoes are the deadliest, stickiest, nasttiest, gassiest of the entire lot. ... 
When this happens the summit of the volcanic structure collapses into the 
emptied ... many of these have calderas so large and irregular they remained 
undetected until ... One of these, LaGarita, located in the San Jauan mountains of 
southern... [DOC] [TLE] caldera - National Geographic Society [PAR] Dec 16, 2014 ... A caldera is a depression created after a volcano partially collapses after ... 
Islands are also a series of shield volcanoes with some summit calderas. ... In 
1968, a massive volcanic eruption produced one of the largest caldera collapses 
in ... These new measurements put the magma chamber at roughly the... [DOC] [TLE] Formation of Crater Lake. - Oregon Explorer [PAR] Crater Lake occupies a basin in Mount Mazama, one of the volcanoes that make 
up the ... The major volcanoes of the Cascades include the following (listed from 
south to north): ... Mount Mazama grew, erupted, then collapsed to form the 
caldera, and finally ... Mount Mazama did not blow its top off; it collapsed in on 
itself. [DOC] [TLE] Volcanic Processes [PAR] The largest one, Olympus Mons, is considered the tallest Mountain (24 km) in the 
... These cones usually erupt lava flows, too; however, the flows erupt through the 
... These collapses can occasionally remove thousands of feet of material from 
the top of ... What remains of a volcano long after the poorly consolidated material
... [DOC] [TLE] h2g2 - Santorini - Remains of a Volcanic Cataclysm - Edited Entry [PAR] Apr 29, 2002 ... The towns of Santorini cling to the top of the cliff looking down on the ... These 
mountains united with the non-volcanic island to make one big ... The surface of 
the volcano collapsed, further deepening the existing caldera and... [DOC] [TLE] Volcanoes and Volcanic Eruptions - Tulane University [PAR] Jan 27, 2012 ... Eventually these inflated balloons of magma drop off and stack up like a pile .... 
Cinder and tephra cones usually occur around summit vents and flank vents of 
stratovolcanoes. ... Calderas form as a result of collapse of a volcanic structure. 
.... The effect lasts only as long

Question: When the top of one of these collapses, a caldera remains
Answer: a volcano