The very soil and Substrata are characteristic.
"Hodge and His Masters"
Richard Jefferies
See then how far we have travelled from the scholastic theory of occult Substrata underlying each group of phenomena.
"A Candid Examination of Theism"
George John Romanes
Even where the argillaceous Substrata are hard at first, they soon become softened and reduced to a plastic state when exposed to the contact of air and water in the floor of a mine.
"The Student's Elements of Geology"
Sir Charles Lyell