. Scientific survey of Porto Rico and the Virgin Islands. Scientific expeditions. Fia. 43. CMnrilc 'Jvfi-!in>iii;i J,:hlHi, Ih fresk aut/iie' (1) Weathered surfaces of Vurtu Un-dn meks show jiartial or complete Ireration of tlic h-mag minerals, especially of tlie ]»yri«i'ncs. This is in I liking contrast with tlie clear, fi'csli, unallfred conilitJou of the same nnurak within^ the hr)dy of Ihe J'ock whoro wnatla-ring inllnmcs hnw i, durahh^'. rm and uirweatliered rodks, art; generally altorrd. heldspars aro com- louly entireJj replaced in parts of tlio rocks far heyornl any influence o
. Scientific survey of Porto Rico and the Virgin Islands. Scientific expeditions. Fia. 43. CMnrilc 'Jvfi-!in>iii;i J,:hlHi, Ih fresk aut/iie' (1) Weathered surfaces of Vurtu Un-dn meks show jiartial or complete Ireration of tlic h-mag minerals, especially of tlie ]»yri«i'ncs. This is in I liking contrast with tlie clear, fi'csli, unallfred conilitJou of the same nnurak within^ the hr)dy of Ihe J'ock whoro wnatla-ring inllnmcs hnw i, durahh^'. rm and uirweatliered rodks, art; generally altorrd. heldspars aro com- louly entireJj replaced in parts of tlio rocks far heyornl any influence of 'gathering. Tlius in n prospt-ct <ni ihe slupe< ( the LinpiJllo Mountain ino-e a sh'aft Inid Ix'.ui >unk AO h'ot IjcIuw Hm- zone, the hdih^ purs were all altered. Ihie foldspars am univi-rsally doll and Jiist«oi,.s>. 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
