. Scientific survey of Porto Rico and the Virgin Islands. Scientific expeditions. Hi3 HCII-ISTIFIC HVII\1-:Y of PijHTi) RKU) <\HM' :\\w\vx\ tu ehloi-itf, ralfilc and !imoHil«?. DoiH' tlic jilaHHlfinii' of oik; or the ritln-r ol' tli<. sccnndarv niiiienVlH, the t-olor oC ilu- rock is oli^^c g-recn or a Iniif vellow. (iraiiis of iiiiioMiciJic an? coimnon and ii few pieces of dovitrificd pjilagonitc oc-<-iir. Tho hhidinj-- of caloito has «h'vi'lopod from inlorsiilial linio silt ajid from \\w. organic-, roniaijis. In ,nia,nv tlio orig-in of liu'so linie
. Scientific survey of Porto Rico and the Virgin Islands. Scientific expeditions. Hi3 HCII-ISTIFIC HVII\1-:Y of PijHTi) RKU) <\HM' :\\w\vx\ tu ehloi-itf, ralfilc and !imoHil«?. DoiH' tlic jilaHHlfinii' of oik; or the ritln-r ol' tli<. sccnndarv niiiienVlH, the t-olor oC ilu- rock is oli^^c g-recn or a Iniif vellow. (iraiiis of iiiiioMiciJic an? coimnon and ii few pieces of dovitrificd pjilagonitc oc-<-iir. Tho hhidinj-- of caloito has «h'vi'lopod from inlorsiilial linio silt ajid from \\w. organic-, roniaijis. In ,nia,nv tlio orig-in of liu'so liniestoiios wa?< ideiitii-al with lliat of the Coain,o ^ formal ion. SIIALI'B AND CiiKUTS 'Idle shales anjl (duTls fonu bedded deposits oeeorriiig between I be HineKtoiies. Most are silieified, a few <'pi(, and some are eal^. xi\ others are aradlh •lie expi brines uiit in 'relitd'. The roh> are hlaek. dark o-ra,y or g-reen. Miero'^ seopiciilly these shah-s and eherts are of a (haiso material tlic eompoHition of whi IS impossibk' to determine, hut very hi oinhirv ipiariz with rarhonaonH stri'aks, serit-itie flakes and limonite hands. .Most of rliese roeks oontain, small spherieal boles arranged ill lines, some of whu-b cavities are filled with ipiartz. olhei's with quartz can 1h' seen hi alh-r HH-ondary tho eahate imist he tertiary and. 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
