|
Cementation is the last stage in the formation of this type of rock made from accumulated deposits |
sedimentary
|
$1,200 |
DJ |
ROCKS & MINERALS |
2022-02-03 |
#8569 |
|
One of the 3 main types of rock, it's formed by the buildup of material either on land or underwater |
sedimentary
|
$800 |
DJ |
GEOLOGY |
2020-03-03 |
#8172 |
|
Of the 3 types of rock, it's the one in which you'll mainly find fossils |
sedimentary
DD
|
$600 |
J |
WHAT A FOSSIL! |
2014-09-30 |
#6907 |
|
Lamina is a layer in this type of rock that is less than 1 cm. in thickness & is visually separable from other layers |
sedimentary
|
$1,600 |
DJ |
GEOLOGY |
2011-02-03 |
#6079 |
|
Of the 3 main classes of rock, this one accounts for about 75% of all the exposed rocks on land |
sedimentary
|
$800 |
DJ |
GEOLOGY |
2008-05-27 |
#5472 |
|
At the mouth of the Mississippi River, this major class of rock is said to be more than 40,000 feet thick |
sedimentary
|
$400 |
DJ |
GEOLOGY |
2005-04-28 |
#4764 |
|
Of the 3 main classes of rock, this one accounts for about 75% of all the exposed rocks on land |
Sedimentary
|
$400 |
DJ |
GEOLOGY |
2001-01-19 |
#3775 |
|
Material from denudation is found in this class of rocks that includes shale |
sedimentary
|
$300 |
J |
GEOLOGY |
1995-10-12 |
#2554 |
|
Of the 3 major types of rock, nearly all oil deposits occur in this one |
sedimentary
|
$200 |
DJ |
GEOLOGY |
1994-12-20 |
#2372 |
|
Of the 3 major divisions of rocks, shale is classified as this |
sedimentary
|
$200 |
J |
ROCKS & MINERALS |
1994-04-22 |
#2230 |
|
This class of rocks is formed from deposits on lake beds & sea floors |
sedimentary
|
$200 |
DJ |
ROCKS & MINERALS |
1993-05-14 |
#2015 |
|
Lamina refers to the thinnest discernible layer in this class of rock |
sedimentary
DD
|
$750 |
DJ |
GEOLOGY |
1992-01-22 |
#1708 |
|
Rocks in this class can be made up of small round particles called ooliths |
sedimentary
|
$600 |
DJ |
GEOLOGY |
1990-04-12 |
#1304 |
|
A lamina is a layer less than 10mm thick found in this class of rock |
sedimentary
|
$600 |
DJ |
ROCKS & MINERALS |
1989-02-08 |
#1028 |
|
Type of rock that may be formed from material settling on the bottom of a calm river |
sedimentary
|
$300 |
J |
GEOLOGY |
1988-01-29 |
#790 |
|
While marble & slate are metamorphic rocks, shale & limestone are this type |
sedimentary
|
$400 |
J |
ROCKS & MINERALS |
1987-10-08 |
#709 |
|
Though ¾ of earth's surface is covered with this type rock, below there are only metamorphic & igneous rocks |
sedimentary
|
$500 |
J |
ROCKS & MINERALS |
1987-05-06 |
#628 |