The orientation angle is the angle between sinuous axis and down-valley axis at any point on the sinuous axis.
2.
The result is a " snaking " pattern as the stream meanders back and forth across its down-valley axis.
3.
The radius of the loop is the straight line perpendicular to the down-valley axis intersecting the sinuous axis at the apex.
4.
They are structurally simpler systems than those of " Porracolina ", because the slope of the waterproof lower-cretaceous base has generated alignments perpendicular to the valleys axis.
5.
As a waveform the meandering stream follows the down-valley axis, a straight line fitted to the curve such that the sum of all the amplitudes measured from it is zero.
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