. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. "We can perhaps best appreciate the process by which these lakes are made by returning in our roiuds to the conditions that must have prevailed about the end of the period during which these sediments were depos- ited. The beds were then at or below sea- level; subsequently they were lifted verti- cally from beneatli the water and stream ero- sion began to cut val- leys in them, while the waves of the sea attacked their margins. In the course of time broad valleys were eroded out where we now have Lagoa
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. "We can perhaps best appreciate the process by which these lakes are made by returning in our roiuds to the conditions that must have prevailed about the end of the period during which these sediments were depos- ited. The beds were then at or below sea- level; subsequently they were lifted verti- cally from beneatli the water and stream ero- sion began to cut val- leys in them, while the waves of the sea attacked their margins. In the course of time broad valleys were eroded out where we now have Lagoa do Norte, Lagoa Mangu- aba, Jiquia, etc. After the cutting of these valleys there came a downward movement which carried the bot- toms of all of them below the level of the sea, and made bays of them. But inasmuch as land erosi^on con- tinned over the part still out of water the streams carried their sediments into these bays and began to silt them up. The sea also, cutting sands from the headlands, threw them. f^. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookauthorha, bookcentury1800, bookdecade1860, booksubjectzoology
