... on their number — On the vast lapse of time, as inferred from the rate of deposition and of denudation —On the poorness of our palaeontological colle... ...or if this had been so, it would have been fatal to my theory; inasmuch as geology plainly tells us that small gen- era have in the lapse of time ofte... ...rited modifications, each profitable to the preserved being; and as modern geology has almost banished such views as the excavation of a great valley ... ...ntermittent ac- tion of natural selection accords perfectly well with what geology tells us of the rate and manner at which 104 On the Origin of Spec... ...xtinction. — This subject will be more fully dis- cussed in our chapter on Geology; but it must be here alluded to from being intimately connected wit... ... on their number — On the vast lapse of time, as inferred from the rate of deposition and of denudation —On the poorness of our palaeontological colle... ...gh each formation has indisputably required a vast number of years for its deposition, I can see several reasons why each should not include a graduat... ... the closest inspection of a formation give any idea of the time which its deposition has consumed. Many instances could be given of beds only a few f... ... of many long intervals of time and changes of level during the process of deposition, which would never even have been suspected, had not the trees c...

...of our voyage, and a sketch of those obser- vations in Natural History and Geology, which I think will possess some interest for the general reader. I... ...he ‘Volcanic Islands visited during the Voyage of the Beagle;’ and on the ‘Geology of South America.’ The sixth volume of the ‘Geological Transactions... ...ffusion of the far lighter and smaller sporules of cryptogamic plants. The geology of this island is the most interesting part of its natural history.... ...l- ingly makes room for the Zorillo. CHAPTER V BAHIA BLANCA Bahia Blanca — Geology — Numerous gigantic Quadrupeds —Recent Extinction — Longevity of sp... ...more- over, was furnished with a long extensile tongue like *Principles of Geology, vol. iv. p. 40. **This theory was first developed in the Zoology o... ...his gravel has been transported, and probably rounded, subsequently to the deposition of the white beds, and long subsequently to the un- derlying bed...