The "Conch Pearl"

1879 Scientific American  
· � -;hey ev �dentlY are the product �f a te�perate, not a I many cases, they c;:;d sum up the principal part of their get it. It costs less to put in and take out ties in gravel than tropical climate. Now other fossils of the cretaceous era, I anxiety and trouble, in rock ballast. The most perfect bed would probably be such as animal remains, indicate a tropical climate fnr that, He then asked the opinion of the members as to the rela-pure gravel on stone.
doi:10.1038/scientificamerican11221879-321a fatcat:xovbmunxzfcrxag3fq2goj3vb4