716 LOUIS AGASSI Z, 



feet above the sea-level, in a succession of 

 regular horizontal terraces, of which Agassiz 

 counted eight. On these terraces, all of which 

 are built, like the shore-bluffs, of tertiary de- 

 posits, were two curious remnants of a past 

 state of things. The first was a salt-pool ly- 

 ing in a depression on the second terrace, some 

 one hundred and fifty feet above the sea. 

 This pool contained living marine shells, iden- 

 tical with those now found along the shore. 

 Among them were Fusus, Mytilus, Buccinum, 

 Fissurella, Patella, and Voluta, all found in 

 the same numeric relations as those in which 

 they now exist upon the beach below. This 

 pool is altogether too high to be reached by 

 any tidal influence, and undoubtedly indicates 

 an old sea-level, and a comparatively recent 

 upheaval of the shore. The second was a 

 genuine moraine, corresponding in every re- 

 spect to those which occur all over the north- 

 ern hemisphere. Agassiz came upon it in as- 

 cending to the third terrace above the salt-pool 

 and a little farther inland. It had all the 

 character of a terminal moraine in contact with 

 an actual glacier. It was composed of hete- 

 rogeneous materials, — large and small peb- 

 bles and boulders impacted together in a paste 

 of clayey gravel and sand. The ice had evi- 



