|
This common fossil-rich sedimentary rock is formed mostly from oceanic ooze |
limestone
|
$1,600 |
DJ |
GEOLOGY |
2025-01-10 |
#9245 |
|
Chalk & tufa are varieties of this sedimentary rock that's mostly calcium carbonate |
limestone
|
$800 |
DJ |
GEOLOGY |
2022-11-09 |
#8738 |
|
This rock can be formed by the accumulation of shells or coral, but not from citrus fruit |
limestone
|
$1,200 |
DJ |
GEOLOGY |
2007-12-04 |
#5347 |
|
Calcium bicarbonate from this, the most abundant soluble rock, is used by sea creatures in forming shells |
limestone
|
$1,600 |
DJ |
GEOLOGY TEST |
2002-09-13 |
#4145 |
|
You'll find stalactites and stalagmites in caverns made of various types of this sedimentary rock |
Limestone
|
$600 |
DJ |
GEOLOGY |
1994-11-22 |
#2352 |
|
The rock of Gibraltar is this type of rock made up of calcite, a form of calcium carbonate |
limestone
|
$500 |
J |
ROCKS & MINERALS |
1994-04-22 |
#2230 |
|
The fossils in this type of rock may remain even after it's changed into marble |
limestone
|
$800 |
DJ |
ROCKS & MINERALS |
1993-05-14 |
#2015 |
|
Stalactites & stalagmites consist primarily of travertine, a form of this stone |
limestone
|
$100 |
J |
ROCKS & MINERALS |
1992-05-06 |
#1783 |
|
Sinkholes & tunnels honeycomb this type of sedimentary rock in karst on the Adriatic |
limestone
|
$1,000 |
DJ |
GEOLOGY |
1992-02-06 |
#1719 |
|
Chalk is a form of this sedimentary rock |
limestone
|
$1,000 |
DJ |
ROCKS & MINERALS |
1987-03-13 |
#590 |
|
Fizzing when acid is applied, this mineral is the base of the Portland cement industry |
limestone
|
$500 |
J |
ROCKS & MINERALS |
1985-11-13 |
#308 |