Synform


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Synform

 

a structure formed by the downward bending of rock strata onto earlier and steeper folds of smaller size. Synforms are usually accompanied by antiforms, which are oppositely shaped. For example, the sheets of overthrust nappes often form, together with rocks, the foundation of a synform and an antiform. While the cores of synclines contain only younger rocks, those of synforms may contain both older and younger rocks.

References in periodicals archive ?
Synform (Laufer, 1991): Errors resulting from sound-alike or look-alike confusion; e.
2010, Fine-grained non-carbonate particles embedded in neritic to pelagic limestones (Lochkovian to Emsian, Prague Synform, Czech Republic): composition, provenance and links to magnetic susceptibility and gamma-ray logs.
12a), a general indication of the northward dip of the southern limb of the synform can be ascertained by strong reflections from the scarp slopes facing the sun (south) and less reflection along the dip slopes (see location A on Fig.
Intraplate volcanism in compressive regimes has been recently suggested to be driven by the compression near collisional/subduction plate boundaries that causes lithospheric folding of the foreland region, resulting in a decrease of the pressure beneath the swell of the antiform while the pressure beneath the synform increases (Shin et al.
Late Aeronian graptolite sedgwickii Event, associated carbon isotope excursion and facies changes in the Prague Synform (Barrandian, Bohemia).
Structural analysis will determine the exact nature of the geology, though it is possible that the mineralisation outline defines an overturned isoclinal synform with both limbs truncated by erosion below shallow surface cover.
Further drilling during 1999 targeted at 150 depth on the southern limb of the Nifty synform also encountered chalcocite mineralisation.
Slavik gives an interesting study of Silurian conodonts from the Prague Synform.
At an early stage of exploration the main structural feature was thought to be a doubly-plunging synform with its axis running NE-SW, with the host rock forming the core of the synform.