GeoWord of the Day

The GeoWord of the Day is a free service of the American Geosciences Institute. All of the terms and definitions are from the Glossary of Geology, 5th Edition Revised.

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marsh creek . A drainage channel developed on a salt marsh.

marsh creek . A drainage channel developed on a salt marsh.

marsh creek . A drainage channel developed on a salt marsh.

growth ring [paleont] . A growth line on a rugose coral.

pyramidal cleavage . Mineral cleavage parallel to the faces of a pyramid, e.g. the (101) cleavage of scheelite.

detachment [soil] . Separation of transportable particles from a soil layer, usually by running water, raindrop impact, or wind. Cf: dispersion [soil].

nivation hollow . A shallow depression or hollow in a mountainside, permanently or intermittently occupied by a snowbank or snow patch and produced by nivation. If the snow completely melts each summer the hollow is deepened; otherwise not (Thorn, 1976). It has been suggested that deepening of a nivation hollow produces a cirque, but this is not proven. Syn: nivation cirque; snow niche.

haxonite (hax'-on-ite). A metallic white cubic meteorite mineral: (Fe,Ni)23C6 .

follicle (fol'-li-cle). A simple dry dehiscent fruit that produces seeds and that has one carpel and splits along one seam only.

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