Columnar structure


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(Geol.) a structure consisting of more or less regular columns, usually six-sided, but sometimes with eight or more sides. The columns are often fractured transversely, with a cup joint, showing a concave surface above. This structure is characteristic of certain igneous rocks, as basalt, and is due to contraction in cooling.<- as="" at="" giant's="" causeway,="" ireland="" -="">
See under Columnar.

See also: Columnar, Structure

References in classic literature ?
360) has compared the fissures by which the columnar structure seems to be determined, to the joints that traverse nearly all rocks, but which are best seen in the non-stratified masses.
A columnar structure that enables analytic analysis on the latest data, for real-time use cases such as time series data, machine data analytics and online reporting.
To produce an aligned particle structure, the magnetic field is applied to the matrix during cross-linking so that the columnar structure of magnetizable particles can be formed and become locked in place upon the final cure.
The results show that the coatings topography was dominated by domes and craters which were uniformly distributed over the surface, and all coatings showed a columnar structure.
In Figure 6 (a and b) are shown the experimental measurements of the variation of the primary and secondary dendrite arm spacings as a function of distance from the metal/mold interface, the restricted region with columnar structure.
By using the columnar structure, a gain variation of less than 1.
The coatings have a columnar structure, which is similar with previous studies.
7% Fe condensates, a large proportion of the crystals have the columnar structure with fully fragmented twins, oriented in the direction normal to their growth <111>(Figure 2b).
1 is different from the columnar structure of acrotretoid brachiopod shells (Williams & Holmer 1992), as well as from that of Mickwitzia shells (Skovsted & Holmer 2003), where columns penetrate initially organic-rich layers.
Both prismatic and columnar structure types refer to aggregates that are taller than they are wide.
Using the Welsh system must take the columnar structure of such basis importance, even easier to understand.