Proximal and distal hummocky cross-stratified facies on a wide Ordovician shelf in Iberia
PJ Brenchley, M Romano, JC Gutierrez-Marco - 1986 - archives.datapages.com
PJ Brenchley, M Romano, JC Gutierrez-Marco
1986•archives.datapages.comThe sandstone of the Monte da Sombadeira Formation (25 m to 200 m thick) crops out
repeatedly on the flanks of open folds in an area 550 km long and 140 km wide
(approximately 75 000 km 2). At all localities there is a vertical change from mudstone to
fissile siltstone into the sandstone of the formation itself and a return to fissile siltstone, then
mudstone above the formation. Within the sandstone formation there are lateral facies
differences, which are related to the paleogeography of the Ordovician shelf.
repeatedly on the flanks of open folds in an area 550 km long and 140 km wide
(approximately 75 000 km 2). At all localities there is a vertical change from mudstone to
fissile siltstone into the sandstone of the formation itself and a return to fissile siltstone, then
mudstone above the formation. Within the sandstone formation there are lateral facies
differences, which are related to the paleogeography of the Ordovician shelf.
Abstract
The sandstone of the Monte da Sombadeira Formation (25 m to 200 m thick) crops out repeatedly on the flanks of open folds in an area 550 km long and 140 km wide (approximately 75 000 km 2). At all localities there is a vertical change from mudstone to fissile siltstone into the sandstone of the formation itself and a return to fissile siltstone, then mudstone above the formation. Within the sandstone formation there are lateral facies differences, which are related to the paleogeography of the Ordovician shelf.
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