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    Slate and schist

    Mud turned to stone under pressure, and the dark shine of the Mosel slopes.

    Slate and schist in the atlas

    1. Atlas regionDouro
    2. Atlas regionPriorat
    3. Atlas regionMosel
    4. Atlas regionRheingau

    Atlas regions where this rock appears in the text or the soil profile.

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    What it is

    Slate is a low-grade metamorphic rock formed when mudstone is put under pressure. Schist is the next step: a medium-grade rock of thin mineral layers, often with mica.1

    slate
    gravel
    clay

    Schematic: how fast water drains through the rock. A qualitative comparison based on the sources on this page.

    Mosel

    Half of the Mosel vineyard lies on Devonian slate about 400 million years old, in blue, grey, brown and reddish shades.2 The regional brochure says slate stores heat for cool autumn nights.3

    Regions

    Sources

    1. Rock set general cards (education resource). The Geological Society of London. level 4 · checked 2026-10-13
    2. Wurzeln (Geologie). Moselwein e.V. (Weinland Mosel). level 4 · checked 2026-10-13
    3. Mosel wine brochure (English, 2010) — publisher not stated in document. weinland-mosel.de (Mosel regional wine promotion), 2010. level 4 · checked 2026-10-13
    4. On rocky ground: The science of soil and wine taste (Prof. Alex Maltman). Decanter, 2018. level 4 · checked 2026-10-13