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syncline -- A fold of rock layers that is convex downwards. Antonym of anticline.
syncline A fold that is convex downward, or that had such an attitude at some stage in its development. compare anticline.
taconite A bedded ferruginous chert containing at least 25% iron. A potential iron ore.
Geosyncline:
A major trough or downwarp of the Earth's crust, in which great thicknesses of sedimentary and/or volcanic rocks have accumulated.
Geothermal Gradient:
The progressive increase of temperature with depth into the Earth.
In this next scene, near the coast in southeastern South Africa, is another fold belt known as the Cape Ranges, a collection of anticlines and synclines running about east-west, and made up of Paleozoic rocks.
Magma, Silcrete, Sill, Silt, Siltstone, Slate, Stream Flow, Strike-Slip Fault, Structural Landform, Subduction, Subduction Zone, Submarine Canyon, Subsidence, Surface Wave, Syncline, ...
range from the geometric primitives of points, lines, and areas to the topological relationships of adjacency and connectivity through the dynamic relations of flow and interaction to domain-specific concepts as such as neighborhood, geosyncline, ...
Other features include the Upton's Cave Syncline north of the Plum River Fault Zone and two structural domes south of the fault zone on the eastern edge of the county, the Forreston Dome and the Brookville Dome (Treworgy 1981).
 See also: Surface, Fault, Map, Sediment, Area
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