...rocks is the intrusion into them of igneous rocks. Rocks so changed are termed metamorphic. Monzoiuto. An even-grained intrusive igneous rock intermediate...Sedimentary beds as deposited lie flat or nearly flat. (See Pl. XXVIII, p. 118.) Shale. A rock consisting of hardened thin layers of fine mud. Slate. A rock that...

...easily in certain directions than in others. A schist has a crystalline grain roughly comparable with the grain of a piece of wood. Sedimentary rocks. Rocks...beds as deposited lie flat or nearly flat. (See PI. VI, p. 52; PI. XXVI, p. 114; PI. XXXII, p. 126.) Shale. A rock consisting of hardened thin layers of...

...coal); of the product of chemical action or of evaporation (salt, gypsum, etc.); or of mixtures of those materials. Some sedimentary deposits (tuffs) are composed...rock consisting of hardened thin layers of fine mud. Stratigraphy. The branch of geologic science that deals with the order and relations of the strata...

...materials. Some sedimentary deposits (tuffs) are composed of fragments blown from volcanoes and depcsited on land or in water. A characteristic feature of sedimentary...is a bed or stratum. Sedimentary beds as deposited lis flat or nearly flat. Shale. A rock consisting of thin hardened layers of fine mud. Slate. A rock...

...Quartz! te. A rock composed of sand grains cemented by silica into an extremely hard mass. Bhyolite. A lava, usually of light color, corresponding in chemical...Sedimentary beds as deposited lie flat or nearly flat. (See Pl. XXVIII, p. 118.) Shale. A rock consisting of hardened thin layers of fine mud. Slate. A rock that...

...easily in certain directions than in others. A schist has a crystalline grain roughly illustrated by the grain of a piece of wood. Sedimentary rocks. Rocks...Sedimentary beds as deposited lie flat or nearly flat. Shale. A rock consisting of thin hardened layers of fine mud. Slate. A rock that by subjection to pressure...

...particles of various sizes (conglomerate, sandstone, shale); of the remains or products of annuals or plants (certain limestones and coal); of the product...Sedimentary beds as deposited lie flat or nearly flat. Sempatlc. Descriptive term applied to porphyritic igneous rocks to indicate that the total volumes...

...product of chemical action or evaporation (salt, gypsum, ete.); or of mixtures of these materials. A characteristic feature of sedimentary deposits is...Sedimentary beds as deposited lie flat or nearly flat except when they have been tilted by earth movements. Shale. A sedimentary rock consisting of hardened...

...from volcanoes am", deposited on land or In water. A characteristic feature of sedlmen600 601 tary deposits, Is a layered structure known as bedding...Sedimentary beds as deposited lie flat or nearly flat (Ransome) Sedimentation. The accumulation oi earthy particles, usually under water. A sedimentary rock...

...frutrinpnfs blown from volcanoes and deposited on land or in water. A characteristic feature of sedimentarr deposits Is a layered structure known as bedding or...Sedimentary beds as deposited lie flat or nearly flat. (Ransome) Sedimentation. The accumulation of earthy particles, usually under water. A sedimentary rock...