Climate change may be accelerating ancient rock art degradation

Climate change may be accelerating the degradation of ancient rock paintings in Indonesia, including the oldest known hand stencil in the world which dates back to 39,900 years ago, according to a study published in Scientific ...

Neglected species: The symbolic significance of saving snails

Later this year, virtually all the countries on Earth are due to meet in China under the Convention on Biological Diversity to agree global conservation targets for 2030. Virtually may be the operative word, if COVID-19 precludes ...

Bacteria-based concrete offers climate benefits

"The building industry emits huge volumes of CO2", says SINTEF researcher Simone Balzer Le, who is part of a cross-disciplinary research team currently developing a biological cement called BioZEment. "The manufacture of ...

What is karst, and why should we care about it?

Fauna & Flora International (FFI) has made a habit of bucking the trend by working to safeguard neglected landscapes that are not necessarily a priority for other conservation organizations. Arguably one of the least familiar ...

New Denisovan DNA expands diversity, history of species

While the continents of Africa and Europe have been obvious and fruitful treasure troves for exploration and discovery of our modern human origins, Asia has been somewhat overlooked. Scientists have thought that modern humans ...

World's oldest artwork uncovered in Indonesian cave: study

An Indonesian cave painting that depicts a prehistoric hunting scene could be the world's oldest figurative artwork dating back nearly 44,000 years, a discovery that points to an advanced artistic culture, according to new ...

Preserving the past in 3-D

It isn't often that you get a sunny, 70-degree day in the beginning of February, especially less than a week after a record-setting cold snap plunged most of Illinois into subzero temperatures. We certainly aren't about to ...

How can forests regenerate without birds?

Human activity continues to shape environmental systems around the world creating novel ecosystems that are increasingly prevalent in what some scientists call the Anthropocene (the age of humans). The island of Guam is well ...

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Limestone

Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3). Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera.

Limestone makes up about 10% of the total volume of all sedimentary rocks. The solubility of limestone in water and weak acid solutions leads to karst landscapes, in which water erodes the limestone over thousands to millions of years. Most cave systems are through limestone bedrock.

Limestone has numerous uses, including as a building material, as aggregate to form the base of roads, as white pigment or filler in products such as toothpaste or paints, and as a chemical feedstock.

This text uses material from Wikipedia, licensed under CC BY-SA