|
Tephra is a collective term for all the materials ejected into the air from one of these |
a volcano
|
$400 |
DJ |
GEOLOGY |
2017-02-27 |
#7476 |
|
The Eniwetok Atoll sits on a limestone cap that's sitting on the summit of one of these |
a volcano
|
$2,000 |
DJ |
GEOLOGY |
2003-09-15 |
#4371 |
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One of these is considered dormant if it has erupted in historic times & is likely to again |
volcano
|
$100 |
J |
GEOLOGY |
1994-09-07 |
#2298 |
|
Ash & pumice are examples of tephra, the fragmental material ejected from one of these |
volcano
|
$400 |
DJ |
GEOLOGY |
1993-07-23 |
#2065 |
|
In 1963 the island of Surtsey near Iceland was created by one of these |
a volcano
|
$200 |
DJ |
GEOLOGY |
1993-01-08 |
#1925 |
|
A caldera is formed by the collapse of the cone on one of these |
volcano
|
$600 |
DJ |
GEOLOGY |
1988-06-22 |
#893 |
|
It's a vent in the earth's crust from which gasses, pyroclastic material & lava come out |
volcano
|
$200 |
DJ |
GEOLOGY |
1987-05-15 |
#635 |