"It is therefore called the 'Ozark Uplift.'"
"That is interesting," answered Ned solemnly, though it is doubtful if he understood what the Professor was really talking about.
"There is still another of tremendous import connected with this region. You will all be interested in it," announced the Professor impressively.
The boys gathered about him in a circle, meantime allowing their ponies to nibble at the green leaves.
"Yes," urged Tad.
"The region where is now located the Ozark Uplift is said to have been the first land to appear above the waters of the continental ocean."
"You—you mean—" stammered Ned.
"He means this was the first land to appear above the water when this continent was all an ocean," spoke up Tad, with quick understanding.
Stacy urged his pony further into the circle. His face was flushed and he evidently was filled with some sudden new thought.
"What is it, Master Stacy?" asked the Professor.