Definition
Marl is an unconsolidated sedimentary rock consisting of clay and lime
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
History
Origin
-
Romania and Moldova, Europe
Discoverer
William Smith
Unknown
Etymology
From Old French marle, from Late Latin marglia
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Soft Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock