. The building of an island : being a sketch of the geological structure of the Danish West Indian island of St. Croix, or Santa Cruz. Geology -- Virgin Islands of the United States Saint Croix. THE l;i OK AX ISLAND. CHAPTER II. The Limestone and Maki. Formation in the Centkai, Slope. The Central Slope of the island is occupied by the hmestone and marl formation, which also stretches along the southwestern shore to the west end of the island. We shall see later that it is the youn<i;er of the two great form- ations which make up the island, namely, the nuxj'l and the '• hhic-bcachr
. The building of an island : being a sketch of the geological structure of the Danish West Indian island of St. Croix, or Santa Cruz. Geology -- Virgin Islands of the United States Saint Croix. THE l;i OK AX ISLAND. CHAPTER II. The Limestone and Maki. Formation in the Centkai, Slope. The Central Slope of the island is occupied by the hmestone and marl formation, which also stretches along the southwestern shore to the west end of the island. We shall see later that it is the youn<i;er of the two great form- ations which make up the island, namely, the nuxj'l and the '• hhic-bcachr and that it rests upon the latter. The soil over the marl formation sometimes, and especiallv on the hillslopes, has a whitish appearance, and very often contains numerous stones broken out of the formation in a way to lie studied later. The formation mav l)e examined wherever it has been l)roken into, eitlier naturalh' or artificiallv, as, for instance, artificiallv in road-cuttings and quarries, and naturally in sea-cliffs, watercourses and the like. We begin our study with a road-cutting at .Xnna's Ilope estate, which is jiarticularlv suitable because it is easily accessible from Christiansted. Here the road is cut in the hillside, which gives us an opportunity to learn of what stuff the hill is built up. If the study is quite new to us, the first thing which will strike us will probably be that the rocks shewn at the roadside are arranged in layers, and the (|uesti(in will arise, how is that to be accounted for? Whatever their origin there can be no mistake about the fact of the existence of these layers, some of which form at this spot, as shewn in the accompanying photograph, natural steps in a path cut into the hillside and le;iding u]) to the estate residence. A furt her examination of the layers shows that some are softer than others, so that the weather acting on them wears them back and leaves the harder ones prominent. To proceed further, we ought to have a jiocke
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