Posts Tagged ‘limestone’
New ‘coat’ keeps limestone from eroding
CARDIFF U. (UK) — A new treatment for historic limestone buildings protects them from erosion by acid rain and atmospheric pollutants while allowing the stone to “breathe.” Continue…
Tuesday, December 4, 2012 12:15 - 0 Comments
Earth & Environment - Apr 28, 2010 12:00 - 1 Comment
Extinction by acidic ocean: past or present?
STANFORD (US)—New evidence uncovered by analyzing calcium embedded in Chinese limestone suggests that volcanoes, which spewed massive amounts of carbon dioxide into the atmosphere for a million years, caused the biggest mass extinction on Earth. (more…)
Science & Technology - Dec 14, 2009 12:26 - 2 Comments
How ho-hum crystals turn into shells
CORNELL (US)—Single crystals of the mineral calcite—the chief material in limestone—are predictable, homogeneous, and, well, a little boring. (more…)
Earth & Environment - Aug 10, 2009 4:00 - 0 Comments
In African rocks, traces of evolutionary blast
UNC CHAPEL HILL (US)—New research has opened the door on what some consider to be the greatest event in the history of animal life: a massive evolutionary jumpstart during the Cambrian Explosion half a billion years ago. (more…)
