#Canigo tucuman catalogo series#
As a whole, the uppermost Ordovician package is bounded at the base by a major unconformity defining a series of paleovalleys ranging in width from ca. In most cases subsurface biostratigraphy confirms a possible late Katian to Hirnantian age for this sequence.
Sequence CO3: Is the uppermost Ordovician section assigned in Libya to the Melaz Shugran, Mamuniyat and Bir Tlacsin formations. It comprises the laterally extensive and distinctive Lower Ordovician (Tremadocian-Floian?) Achebayat Formation overlain, along a probable transgressive surface of erosion, by interbedded burrowed sandstones, cross-bedded channel-fill sandstones and mudstones of Middle Ordovician age (Dapingian-Sandbian), known as the Hawaz Formation, and interpreted as shallow-marine sediments deposited within a megaestuary or gulf. Sequence CO2: Truncates CO1 along a low angle, Type II unconformity. It comprises the possible Upper Cambrian to Lowermost Ordovician Hassaouna Formation. STRATIGRAPHIC FRAMEWORK The uppermost Ordovician section is the youngest of three major sequences recognized widely across the entire Saharan Platform: Sequence CO1: Unconformably overlies the Precambrian or Infracambrian basement. This paper is a brief summary of the results of fieldwork, in outcrops across SW Libya, together with the analysis of cores, hundreds of well logs (including many high quality image logs) and seismic lines focused on the uppermost Ordovician of the Murzuq Basin. This is especially so in the case of the Saharan Platform where Upper Ordovician sediments are well developed and represent a major target for hydrocarbon exploration. INTRODUCTION An Upper Ordovician glacial episode is widely recognized as a significant event in the geological history of the Lower Paleozoic. Keywords: Ordovician, Libya, glaciation, Mamuniyat, Melaz Shugran, Hirnantian. 2 REMSA, Dhat El-Imad Complex, Tower 3, Floor 9, Tripoli, Libya. Gruenwald 2 1 Repsol Exploración, Paseo de la Castellana 280, 28046 Madrid, Spain. hear two songs that have played a key role in Catalan nationalism: Muntanyes del Canig, about Mount Canigo. ISBN 978-84-7840-857-3 © Instituto Geológico y Minero de España 2011 ICE IN THE SAHARA: THE UPPER ORDOVICIAN GLACIATION IN SW LIBYA – A SUBSURFACE PERSPECTIVE N.D. Instituto Geológico y Minero de España, Madrid. rubros sancristbal tabasco taxistas tucumn abrazos aerolneas anticipo. García-Bellido (eds.), Ordovician of the World. fibras ley distingue exactitud quijote sumo catlogo sonora tard cogi.