Thus the old red sandstone is so called, because it generally, though not always, appears as a dark red sandstone.
For an instance of this in the old red sandstone, see p. 329.
Agassiz at once confirmed my suspicion that the ichthyolites of the old red sandstone were intermediate.
It was dug out of the old red sandstone—and there are missing links!
Pterichthys, ter-ik′this, n. a genus of fossil ganoid fishes in the old red sandstone strata, with wing-like pectoral fins.
This sandstone appears, from its texture and position, to be the "old red sandstone" of geologists.
The Reeks are chiefly composed of hard green and purple grits, and sandstone of old red sandstone age.
Asterolepis, a genus of primitive ganoid fishes, found only in a fossil state in the old red sandstone.
The rock-salt of Cheshire and the brine-springs of Worcestershire occur in what is called the old red sandstone group.
Assuredly no young geologist will find more stimulating chapters than those penned by the author of the old red sandstone.'