Lias Definition
Lias (lī′əs)
noun
a series of rocks, the oldest or lowest part of the Jurassic System, noted for its fossils
Etymology: ME lyas < OFr liois (Fr liais), kind of limestone < ? Gmc, as in MHG leie, stone
Lias Usage Examples
Adjective modifier
blue: Today friends joined us for lunch at the Blue Lias pub ( blue lias refers to the local stone ).
Modifies a noun
- limestone: To the right a projecting C17 wing of Charnwood granite with beyond a C19 rendered lean-to of dressed lias limestone with two 2-light casements.
- stone: The roof was probably of blue lias stone tiles.
- clay: The natural blue lias clay was seen in the north western part of the site.
- rubble: To the east of the south door a roughly laid area of mortared lias rubble was found, [ 202 ] .
- floor: The lias floor was laid in 1984 to replace an earth floor that was constantly dug by treasure seekers.

