The Philippine journal of science . 8, 235 et seq. IX, A, 2 Pr^att: Geology of Cement Materials 153 the lower flanks of a cordillera made up of Pre-Oligocene igneousand metamorphic rocks are the upturned edges of sedimentary-beds which dip away from the axis of the cordillera on bothsides. Both the trend of the cordillera and the general strikeof the sedimentary rocks are north 20° east. West of thecordillera is the Miocene series in which the Uling coal occurs,while beds of tuff and limestone, more recent than the coalmeasures, are encountered in considerable thickness on theeastern flank of
The Philippine journal of science . 8, 235 et seq. IX, A, 2 Pr^att: Geology of Cement Materials 153 the lower flanks of a cordillera made up of Pre-Oligocene igneousand metamorphic rocks are the upturned edges of sedimentary-beds which dip away from the axis of the cordillera on bothsides. Both the trend of the cordillera and the general strikeof the sedimentary rocks are north 20° east. West of thecordillera is the Miocene series in which the Uling coal occurs,while beds of tuff and limestone, more recent than the coalmeasures, are encountered in considerable thickness on theeastern flank of the igneous-metamorphic complex. The coal-bearing rocks consist of a basal conglomerate overlainin turn by limestone, shales, fine-grained clastic rocks, alternatingshales and sandstones, and an upper limestone. Three coalseams varying from 1 to 5 meters in thickness are intercalated Mioczne and Pre-Oligocene MioceneKl) Pliocene anc/Oligocene Igneous and ^hakdJuf/ond Pleiilocene CoalMeaiures Metamor^hkCemplex Limeifom Limirdfonei. Wesf-norhweil tait-^ouihea^f^ Fig. 2. Diagrammatic cross section from the southeastern coast of Cebu to Mount Uling;length of section, 8 kilometers. (A) Limestones 35, 37, and 39; (B) andesitic agglomerate;(C) hmestone 46; (D) tuff 47; (E) conglomerate, shale, etc.; (F) clastic rocks 48 and 49;(G) limestone 50; (H) shale 51; (K) upper limestone of coal measures. with the alternating shales and sandstones, while a single seamabout 1 meter in thickness is found in the basal lowest member of the sedimentary series on the easternflank of the cordillera is also a conglomerate which is associatedat places with limestone, but no coal-bearing series overliesthese rocks; instead, are about 100 meters of shales, sands,and clastic rocks overlain in turn by tuffs, limestones, volcanicagglomerate, and at the top of the series by other most recent limestones are of Pliocene and Pleistoceneage according to Abella,^ and they are of
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1906
