Excerpt from A Text-Book of Geology
Dynamical geology (dynamis, force or energy) treats of the forces that make changes upon or beneath the sur face of the earth. Hence we speak of the work of the atmosphere, of water, heat, and life in the chapters that follow.
Structural geology explains the composition of rocks and the forms in Which they occur. Thus some rocks are sandstones or limestones, others are slates or schists, and others are anc...
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