Premium Only Content

Limestone!
Limestone (calcium carbonate CaCO3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO3. Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life.
About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, CaMg(CO3)2. Magnesian limestone is an obsolete and poorly-defined term used variously for dolomite, for limestone containing significant dolomite (dolomitic limestone), or for any other limestone containing a significant percentage of magnesium. Most limestone was formed in shallow marine environments, such as continental shelves or platforms, though smaller amounts were formed in many other environments. Much dolomite is secondary dolomite, formed by chemical alteration of limestone. Limestone is exposed over large regions of the Earth's surface, and because limestone is slightly soluble in rainwater, these exposures often are eroded to become karst landscapes. Most cave systems are found in limestone bedrock.
Limestone has numerous uses: as a chemical feedstock for the production of lime used for cement (an essential component of concrete), as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paint, as a soil conditioner, and as a popular decorative addition to rock gardens. Limestone formations contain about 30% of the world's petroleum reservoirs
-
1:53:44
FreshandFit
9 hours agoMoney Monday Call-In Show w/ Brandon Carter & Greg O'Gallagher
81.2K13 -
Dr Disrespect
17 hours ago🔴LIVE - DR DISRESPECT - PUBG - SNIPING ALL DAY
239K24 -
1:37:14
Glenn Greenwald
11 hours agoIs Any Due Process Needed to Send Immigrants to Lifelong Prison in El Salvador? Trump Continues the Long-Standing Bipartisan Policy of Bombing Yemen | SYSTEM UPDATE #424
120K199 -
4:24:56
OhHiMark1776
10 hours ago🟢03-17-25 ||||| Build-a-Board ||||| Chillin'
60.2K4 -
1:14:45
Sarah Westall
11 hours agoEpstein Limited Hangout, Manson Comparisons and CIA’s Operation Chaos w/ George Webb
109K15 -
1:04:25
We Like Shooting
1 day ago $5.98 earnedDouble Tap 401 (Gun Podcast)
58.5K4 -
1:16:11
Donald Trump Jr.
12 hours agoMy Father Puts Maduro’s Gangs on Notice — and Sends Them Packing,
157K196 -
51:01
BonginoReport
12 hours agoTrump Banishes Violent Gangs, Dunks on them with Hilarious Videos (Ep. 06) - 03/17/2025
158K210 -
1:13:08
Kim Iversen
13 hours agoWar With Iran: Trump Marches To Israel's Drumbeat | Dictator-In-Chief? Is Trump Going Too Far?
114K399 -
36:54
Kimberly Guilfoyle
11 hours agoBREAKING NEWS on Deportations, Live with Mike Davis and Nicole Kiprilov | Ep205
77.7K45