wearers so oS we 
E. A. Smith— Geology of Florida. 307 
close observers as Conrad and Tuomey should have overlooked 
them if they occur at least from Tampa southward. 
4th. After the Miocene (or possibly after the. Pliocene) 
period, there was again an elevation* of Florida, as is shown 
by the presence of a Miocene limestone on the eastern slope of 
the peninsula, some distance (not less than thirty feet) above 
present sea level. K 
The absence along the Gulf coasts, of Miocene and later 
Tertiary deposits, either of marine (limestone), or of brackish 
or fresh-water (Grand Gulf) origin, has already been accounted 
or above. 
5th. We have evidence in the distribution of the beds of 
the Champlain period (Stratified Drift or Orange Sand), that 
Florida and parts of adjacent States were during this time sub- 
merged sufficiently to allow the deposition over them of a mass 
of pebbles, sand and clay, varying in thickness from a few 
feet to two hundred. The conditions under which these beds 
Were deposited have been ably discussed by Hilgard in this 
Journal, and in his Mississippi and Louisiana Reports. 
structure as well as of fossils, and were probably deposited 
from slowly running or nearly stagnant waters. : 
The direct superposition of the Loam upon the Stratified 
Drift throughout Florida 
ce of the Mississippi, where, as Hilgard has shown, the ex- 
Temes of oscillation were experienced, this gradual change, 
* On this point, compare foot-note on page 306, above. ~ 
