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Tag: Rocks

Rock cycle

The cycle of rocks as it was presented by James Hutton already 200 years ago.

The cycle of rocks as it was presented by James Hutton already 200 years ago. Rocks that are exposed to weathering and erosion, deposit as sediments, which are then covered by more sediments. This process leads to compaction and cementation, which forms sedimentary rocks. After being buried deeply, rock undergo metamorphosis or melting, or both. Later, rocks are uplifted to the surface, while being deformed or crystallised. After they become exposed to weathering, the rock cycle starts all over.

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SZI geologic evidence

Schematic illustration of the emplacement of subduction zone initiation (SZI)-typical rock evidence during SZI, and a typical SZI ophiolite sequence.

Schematic illustration of the emplacement of subduction zone initiation (SZI)-typical rock evidence during SZI, and a typical SZI ophiolite sequence. Note that this is a text-book example (according to e.g., the Izu-Bonin-Mariana SZI) and that pre-existing structures (e.g., a pre-existing volcanic arc) or variable SZI dynamics (e.g., horizontal compression) could inhibit various stages and therefore their typical rock signatures.

  • Creator: Fabio Crameri
  • This version: 18.08.2021
  • License: Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
  • Specific citation: This graphic by Fabio Crameri from Crameri et al. (2020) is available via the open-access s-Ink repository.
  • Related reference: Crameri, F., V. Magni, M. Domeier, G.E. Shephard, K. Chotalia, G. Cooper, C. Eakin, A.G. Grima, D. Gürer, A. Király, E. Mulyukova, K. Peters, B. Robert, and M. Thielmann (2020), A transdisciplinary and community-driven database to unravel subduction zone initiation, Nature Communications, 11, 3750. doi:10.1038/s41467-020-17522-9
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