Conclusion

To anyone who has had the patience to read through the preceding pages

and to reach these concluding remarks, it must be obvious that geology

is not merely a pastime for specialists. It does not take half a dozen

college and university degrees to collect rocks and minerals, and to

understand what they mean; or to appreciate not alone the beauty, but

also the long and involved, yet logical, origin of scenery; or to

comprehend from a rock-cut or cliff the vast changes which have occurred

in the course of geologic time; or to grasp the current significance, as

well as the historical importance, of such rock and mineral products as

the trap, the limestone, the pyrite, the lead veins, the soapstone, the

varved clay, the gravel banks.

Whether one's interests are practical, historical, acquisitive,

esthetic, philosophical or scientific, the geological features of the

Connecticut Valley possess the variety to gratify them all. One must

indeed be blind if he cannot find something of interest--a hobby--even a

profession in the geological display spread before him in central

Massachusetts. Let it not be thought that this little volume tells the

whole story. On the contrary, its authors expect to have a difficult

time justifying their sins of omission, more particularly because many

of the omissions have been conscious and deliberate. But they trust they

have left for the reader a wealth of features which he can make his own

by right of discovery. For it will not take him very long to penetrate

the fourth dimension of geologic time more deeply and intimately than is

possible in the pages of a book.

The flow of time in the Connecticut valley · 第 20 / 24 题