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Silurian Quotes by Mark Twain
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- The Silurian Period-the grandest of all the Periods,-and, as yet, apparently the seed-time of all succeeding life. — Unknown Author
- Consequently, if my theory be true, it is indisputable that before the lowest Silurian stratum was deposited, long periods elapsed, as long… — Charles Darwin
- The several difficulties here discussed, namely our not finding in the successive formations infinitely numerous transitional links between the many species which… — Charles Darwin
- In the space of one hundred and seventy-six years the Mississippi has shortened itself two hundred and forty-two miles. Therefore, in the… — Mark Twain