Science, Space and Technology News 2024
Porous dolomite rock with cavities that would be ideal for geothermal utilization. Credit: RUB, Marquard
Fluids circulating underground gradually alter rocks over time. These processes must be considered when using rocks as climate archives. Dr. Mathias Müller from the Sediment and Isotope Geology research group at, Germany, along with international colleagues, has detailed which climate information remains preserved in 380-million-year-old limestones from Hagen-Hohenlimburg.
Fossils of corals and brachiopods in the greyish Massenkalk limestone that have been partially diagenetically transformed into light brown dolomite rock along a vertical fissure. Credit: Mathias Müller “We were surprised that the changes in the rock enabled us to identify a large number of significant geological events, such as the opening of the North Atlantic in theand the onset of the folding and subsequent uplift of the Alps hundreds of kilometers away since the lateperiod,” lists Mathias Müller. He considers radiometric uranium-lead dating to be the key to the chronological classification of the so-called overprinting events stored in the rock.
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