Siltstone
/ˈsɪlt.stoʊn/noun
A fine-grained sedimentary rock composed mainly of compacted silt-sized particles.
Did you know?Siltstone is a modern geological compound, and its power is purely in the image: tiny drifting particles become a hard stone through burial, compaction, and cementation.
Etymological Timeline
Old English
OE
silt
“Fine mud or sediment carried by water.”
Proto-Germanic
PGmc
*siltaz
“Mud, sediment, or silt.”
Middle English
ME
ston
“A rock or hard mineral mass.”
Proto-Germanic
PGmc
*stainaz
“Stone, rock.”
Modern English
English
siltstone
“A sedimentary rock made chiefly of silt-sized grains.”
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