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| Keywords: The Quarterly journal of the Geological Society of London (13935673521).jpg 1866 <br> WILSON � ECUADOR <br> 569 <br> limestone appeared to rest on the volcanic deposits and it was the <br> washing away of this latter from underneath that caused the harder <br> limestone to break off in those enormous blocks So far as the <br> author's observations yet extend the earlier beds of the volcanic <br> material are at least contemporaneous with the Tertiary limestone ; <br> and the accumulation of these volcanic outcastings continued until <br> long after the close of the Tertiary period but became gradually more <br> circumscribed <br> Section of Point at Chancama <br> a Vegetable mould <br> b Clay and sand with pottery <br> c Water-worn gravel and clay with <br> pottery <br> d Gravel and clay with pottery <br> e Sand and gravel <br> / Trash-rock <br> ff Blue slaty rock with fragments of <br> shells <br> The second of the terraces described contains in many places <br> remains of articles of human art broken pottery earthen figures <br> and fragments of gold ornaments at various depths below the <br> surface but in all cases below high-tide mark from which fact it is <br> apparent that this region during its occupation by man stood <br> higher above the sea than it does now But the sea gradually en- <br> croached on the land till it attained a height of about fifteen feet <br> above its former level That the duration of time occupied by this <br> advance and retreat of the sea must have been very great is apparent <br> when we consider that the stratified earth of the plain is simply <br> the sediment brought down by the rivers and deposited beneath the <br> margins of the sea in some places to the depth of ten feet above the <br> surface on which the ancient cities stood Again the land sank and <br> deposited those low flats and islands found at different places along <br> the sea-margins The land is again gradually sinking <br> The pottery-stratum is traceable along a line of 80 miles of coast <br> and by partial observations is determined to occur under corre- <br> sponding conditions for a distance of 200 miles more <br> The discovery of pottery in a formation considered by the author <br> immensely older than the clay-beds of the coast in the uppermost <br> excepting one of the terraces described was made at Chancama <br> 2q2 36165022 111477 51125 Page 569 Text v 22 http //www biodiversitylibrary org/page/36165022 1866 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 22 1866 Geology Periodicals Smithsonian Libraries bhl page 36165022 dc identifier http //biodiversitylibrary org/page/36165022 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-21 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13935673521 2015-08-26 06 54 56 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1866 Photos uploaded from Flickr by Fæ using a script | ||||
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