Water resources of the Virgin Islands, a preliminary appraisal, 1963
{-JIit?) HI a11; 1~ &I "'CJ C 0 - I ~ C\.. - ~c (1) (l) C U (l) (1) g a: +- en (l) a... "'CJ C 0 (l) C (l) (l) C U ~~ g~ -= 0 I CA R I B B E r·•,r i ,,r, II - -~· ' n,""'J I I ~ 11..o:r I J i,w ( I '---- \ LJ ~ 1 n .\ I V "" + -- E X p Ill Alluvium Silt, clay, and th1n 1 discontinuous beds of sand and gravel . Includes beach sand. Estimated maximum thickness 30 ft ■ K1ngshill Marl A 11_.., Limestone, sandy limestone, and coral deposits alternating with marl. Maximum thickness at least 600 ft. Figure 3.--Generalized geologic map of St. Croix. N . ,. .... i( I} - ~ H +- J,-------- +- 4- ' ~ t ~ +--+- ~::: -- - ~- - l ~ +- w1i ~ ~ :a1 L >, I,... 0 C I,... (l) - 0 ::, a >, I,... 0 I,... (1) I- A s E A \ ' ' ~ l\l "' \ . I ~ /,'IC' -- - - ;::: -+= 1--t ,___ ~ I - t> ,,j, ~ rr ~ ~- ~l lll ~ u w ~~ - ~ "'1:q i r, ~ N (l) C (l) u 0 a, 0 D C A R I B B E A N 2 0 I I I I I I ___ __L_ SCALE + A T 0 Jealousy Formation Predominantly bluish-gray clay. N A basal calcareous conglomerate makes the only known outcrop . 1 Maximum thickness at least 1,400 ft .: 3 miles _J >, .... 0 -- I,... …
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{-JIit?) HI a11; 1~ &I "'CJ C 0 - I ~ C\.. - ~c (1) (l) C U (l) (1) g a: +- en (l) a... "'CJ C 0 (l) C (l) (l) C U ~~ g~ -= 0 I CA R I B B E r·•,r i ,,r, II - -~· ' n,""'J I I ~ 11..o:r I J i,w ( I '---- \ LJ ~ 1 n .\ I V "" + -- E X p Ill Alluvium Silt, clay, and th1n 1 discontinuous beds of sand and gravel . Includes beach sand. Estimated maximum thickness 30 ft ■ K1ngshill Marl A 11_.., Limestone, sandy limestone, and coral deposits alternating with marl. Maximum thickness at least 600 ft. Figure 3.--Generalized geologic map of St. Croix. N . ,. .... i( I} - ~ H +- J,-------- +- 4- ' ~ t ~ +--+- ~::: -- - ~- - l ~ +- w1i ~ ~ :a1 L >, I,... 0 C I,... (l) - 0 ::, a >, I,... 0 I,... (1) I- A s E A \ ' ' ~ l\l "' \ . I ~ /,'IC' -- - - ;::: -+= 1--t ,___ ~ I - t> ,,j, ~ rr ~ ~- ~l lll ~ u w ~~ - ~ "'1:q i r, ~ N (l) C (l) u 0 a, 0 D C A R I B B E A N 2 0 I I I I I I ___ __L_ SCALE + A T 0 Jealousy Formation Predominantly bluish-gray clay. N A basal calcareous conglomerate makes the only known outcrop . 1 Maximum thickness at least 1,400 ft .: 3 miles _J >, .... 0 -- I,... cu I- 'I\ s '- en 0 :::J 0 >, (l) I,... u 0 0 - .... - Q) Su I,... I,... Q) (1) 0. ~ 0. ~ ~ en ::, 0 Q) u 0 +- Q) I,... u .... (1) 0. 0. ~ 64° 35' BUCK IS. ~ EA + Geology mod1f1ed after D. J. Cederstrom, 1939, and J. T Whet ton, 1961. Intrusives Gabbro and miscellaneous, dark- colored crystalline rocks Mount Eagle Volcanics Mudstone, siltstone, and 1nterbedded water-laid tuff. Thickness at lea,st 30,000 ft. Inferred fault Dotted where concealed . (f) ::, 0 (l) u 0 - (l) I,... u