. Scientific survey of Porto Rico and the Virgin Islands. Scientific expeditions. fiOIENTIFIC HUHM'JY OF I'OliTO RICO !INK-I10LKS ImkhI examples xr lis^ e,xt< tliiin elwnvhc Furro IJieu. One placo where undonbte*! sirik^ioles iire ruimd h .iii the of kildiueier , on tlie Voiiee-Peiraolas royil. Tlie liold evj- deuce hIiows that this process lias heeii less iuiporiaut in shivpiiig th. |H'rs(Mit tupo»TaphT of the Ponce I)istri(3t tbiin in the case of the Tertiar) uii th(; iinrth side of Porto DHTAILI'-I) 'TKJNS OF FOHMATHms Tuff A real iJislrihulion. -Tiilf is t
. Scientific survey of Porto Rico and the Virgin Islands. Scientific expeditions. fiOIENTIFIC HUHM'JY OF I'OliTO RICO !INK-I10LKS ImkhI examples xr lis^ e,xt< tliiin elwnvhc Furro IJieu. One placo where undonbte*! sirik^ioles iire ruimd h .iii the of kildiueier , on tlie Voiiee-Peiraolas royil. Tlie liold evj- deuce hIiows that this process lias heeii less iuiporiaut in shivpiiig th. |H'rs(Mit tupo»TaphT of the Ponce I)istri(3t tbiin in the case of the Tertiar) uii th(; iinrth side of Porto DHTAILI'-I) 'TKJNS OF FOHMATHms Tuff A real iJislrihulion. -Tiilf is the most ahmidiiot rock in the distrii-i. Any north-south traverse ol the areti will disclose a strong- dovt'lopnu'id vt this class ol' material Typical outcrops may be seen at EristMJinla iu»rth (d; .Pefmelas. Yaoco is niuJerlain l)y this rock. Olher good fx-^ pusures may l)e seen along tlie irauco-LaniS road north^ of YancHj. tin the Poiice-Adjuntas road, at intervals between kilometer and nerlln ward, good examples of tliis rock are to \m I'onTuP In the broad east^we^i vallev between Yaiico and Boqueroii occasional remnants of tu(T jn-otriuli' tiir(Higli tlie alluvial covering of the valley floor. ThirkncHH. -^^Due to the pinching and swelling of these beds, whosi^ structure is also very obscure, it is diflficult to <jeterniine their true thick- ness. In^ilaces wlicre large areas arc exposed, it is possible that sonn^ du])li<'ation exists. Tlie strong folding shown by tln^ shales and lime. 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 New York Academy of Sciences. New York, : The Academy
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1919
