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By R. D. Dallmeyer, E. Martinez Garcia (auth.), Dr. R. David Dallmeyer, Prof. Dr. Enrique Martinez Garcia (eds.)
Pre-Mesozoic Geology of Iberia is a big reference for present figuring out of the final tectonostratigraphic evolution of the Iberian Massif. It represents a complete review which systematically describes features of the seven significant lithotectonic parts of the Iberian Massif by way of: - stratigraphy, - paleontology, - sedimentology, - structural geology, - igneous task, - metamorphic evolution, - metallogenesis, and - tectonic importance. those info are compiled in different concluding precis chapters which debate the final geodynamic evolution of the Iberian Massif and description its tectonic environment in the total circum-Atlantic sector. Readers will profit by way of this entire overview of an immense tectonostratigraphic aspect within the circum-Atlantic realm.
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Additional info for Pre-Mesozoic Geology of Iberia
Example text
7) or Palentian Region (Martinez Garcia 1981), shows a different stratigraphic development from the Asturian-Leonese domain. The significance of the observed differences can be explained in various ways and there is no consensus at present between the different authors. There is evidence of considerable synsedimentary tectonism, with recurrent turbidite and submarine fan facies, and the reported presence of olistoliths or alluvial and fluviodeltaic facies related to strong subaerial reliefs. The rate of sedimentation is high from the lower Westphalian onwards, and values of 1000 m per million years are obtained for some parts of the succession.
1985) and Leyva et al. (1985) considered the foraminiferal faunas obtained from the uppermost strata of the lower part of this succession to be characteristic of a level intermediate between the top of the Bashkirian and the base of the Moscovian (Transition Interval). This perhaps can also be recognized in other areas of the Cantabrian Zone. The upper part of this succession has yielded only a few floral remains attributed to either Upper Namurian or Lower Westphalian (Wagner 1959; Julivert 1960).
The top of the Valdeteja Fm. is sharply diachronic. Studies carried out since 1965, especially research on foraminiferal and conodont faunas of these rocks (GinkeI1965; Villa 1982; Menendez Alvarez unpublished data), show that it extends from Marsdenian in the basal beds to, as a maximum, Lower Moscovian at the top in certain sections, such as the type section. Accordingly, noteworthy differences in the age render it difficult to make generalizations about the age of the upper- most levels of the Valdeteja Fm.