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When the crenulation foliation begins to dominate it may totally or almost completely wipe out the original foliation. This process occurs at different rates in rocks and beds of different lithology and chemical composition so that it is usually valuable to look at a variety of outcrops to gain a better appreciation of the effect of crenulation ...
The term originated in about the 14th century from the Old French word batailler, "to fortify with batailles" (fixed or movable turrets of defence). The word crenel derives from the ancient French cren (modern French cran), Latin crena, meaning a notch, mortice or other gap cut out often to receive another element or fixing; see also crenation.
A thin section depicting spaced cleavage. The cleavage domains are darker biotite grains, and the microlithons between consist of mostly muscovite and quartz. The grains in the microlithons are starting to align in a preferred orientation. A new foliation overprinted an old, showing the beginning signs of a crenulation cleavage.
Crenulation cleavage and oblique foliation are particular types of foliation. Interpretation. Foliation, as it forms generally perpendicular to the direction of ...
There are several types of lineations, intersection lineations, crenulation lineations, mineral lineations and stretching lineations being the most common. Lineation field measurements are recorded as map lines with a plunge angle and azimuth.
Diagram of a crenated leaf. Crenation (from modern Latin crenatus meaning "scalloped or notched", from popular Latin crena meaning "notch") [1] in botany and zoology, describes an object's shape, especially a leaf or shell, as being round-toothed or having a scalloped edge.
The term merlon comes from French [1704], adapted from the Italian merlone, possibly a shortened form of mergola, perhaps connected to Latin mergae ("two-pronged pitchfork"), [4] or from a diminutive moerulus, from murus or moerus (a wall).
Originally horizontal strata deformed due to stress. Structural geology is the study of the three-dimensional distribution of rock units with respect to their deformational histories.