Greywacke
At a glance
- Type
- Rock
- Group
- Sedimentary rock
- Crystal system
- None (a rock)
- Hardness
- Hard (5.5 to 7.5)
- Density
- Medium (2.5 to 3.2)
- Occurs in
- Sedimentary rocks
- Foliation
- Bedded (sediment layers)
- Colour
- Grey, Black
- Lustre
- Dull
- Use
- Building
- Difficulty in WildGuessr
- Hard
Did you know?
- Greywacke is a dirty sandstone, sand grains packed in clay, often laid down by underwater avalanches.
- Much of the bedrock of New Zealand's Southern Alps is greywacke.
Could you guess it from clues?
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Similar stones
Classification, names and conservation status come from Wikidata (CC0), the photo from Wikimedia Commons. Wikidata Q917545 · All stones · All entries