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Igneous Structures and Field Relationships - Faculty web pages

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Figure 4-134<br />

13. a. Schematic drawing of columnar joints in a basalt flow, showing the four common subdivisions of a typical flow. The<br />

column widths in (a) are exaggerated about 4x. After Long <strong>and</strong> Wood od (1986) © Geol. Soc. Amer. Bull., 97, , 1144-1155.<br />

1155.<br />

b. Colonnade-entablature<br />

entablature-colonnade in a basalt flow, Crooked River Gorge, OR. © John Winter <strong>and</strong> Prentice Hall.

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