Zur genese einer stirnschuppe der Esla-decke (Kantabrisches Bebirge, Spanien)

Abstract

A special re-mapping of the Esla region (Province of Léon) brought to light an isolated block of allochthonous limestone in the frontal area of the Esla nappe. Three interpretations are discussed: 1. The block is a squeezed out remnant of the north flank of an anticlinorium. There was no movement of a nappe. 2. The block remained attached to autochthonous material during an eastward movement of the Esla nappe. 3. The limestone was isolated during movement of the nappe and was overrun by its own nappe. We can therefore call it a "Stirnschuppe" sensu Tollmann (1967). The third interpretation is most probable.