Showing papers by "University of Oviedo published in 1975"
TL;DR: In this paper, the lack of hinge spines on the left side of the ventral valve in Chonetacea is demonstrated for the first time, which has a special bearing on the evolutionary trends of the Strophochonetinae.
Abstract: The lack of hinge spines on the left side of the ventral valve in Chonetacea is demonstrated here for the first time. This morphological peculiarity has a special bearing on the evolutionary trends of the Strophochonetinae. The existence of several species of Chonetacea, both in the Armorican Massif, the Cantabrian Mountains, and Aragon, is a new fact which confirms very close relations between these three areas during Lower Devonian times.
9 citations
TL;DR: In NW Spain some minor structures in Lower Paleozoic inhomogeneous layered material may be interpreted as the result of progressive deformation during the Hercynian Orogeny as mentioned in this paper.
Abstract: Examples of progressive deformation provided by minor structures are not frequent in the geological literature In NW Spain some minor structures in Lower Paleozoic inhomogeneous layered material may be interpreted as the result of progressive deformation during the Hercynian Orogeny
4 citations