Arid
DOI10.1111/j.1365-3091.2007.00945.x
Aeolian sand sea development along the mid-Cretaceous western Tethyan margin (Spain): erg sedimentology and palaeoclimate implications
Pedro Rodriguez-Lopez, Juan1; Melendez, Nieves1; De Boer, Poppe L.2; Rosa Soria, Ana3
通讯作者Pedro Rodriguez-Lopez, Juan
来源期刊SEDIMENTOLOGY
ISSN0037-0746
EISSN1365-3091
出版年2008
卷号55期号:5页码:1253-1292
英文摘要

The existence of a mid-Cretaceous erg system along the western Tethyan margin (Iberian Basin, Spain) was recently demonstrated based on the occurrence of wind-blown desert sands in coeval shallow marine deposits. Here, the first direct evidence of this mid-Cretaceous erg in Europe is presented and the palaeoclimate and palaeoceanographic implications are discussed. The aeolian sand sea extended over an area of 4600 km(2). Compound crescentic dunes, linear draa and complex aeolian dunes, sand sheets, wet, dry and evaporitic interdunes, sabkha deposits and coeval extradune lagoonal deposits form the main architectural elements of this desert system that was located in a sub-tropical arid belt along the western Tethyan margin. Sub-critically climbing translatent strata, grain flow and grain fall deposits, pin-stripe lamination, lee side dune wind ripples, soft-sediment deformations, vertebrate tracks, biogenic traces, tubes and wood fragments are some of the small-scale structures and components observed in the aeolian dune sandstones. At the boundary between the aeolian sand sea and the marine realm, intertonguing of aeolian deposits and marine facies occurs. Massive sandstone units were laid down by mass flow events that reworked aeolian dune sands during flooding events. The cyclic occurrence of soft sediment deformation is ascribed to intermittent (marine) flooding of aeolian dunes and associated rise in the water table. The aeolian erg system developed in an active extensional tectonic setting that favoured its preservation. Because of the close proximity of the marine realm, the water table was high and contributed to the preservation of the aeolian facies. A sand-drift surface marks the onset of aeolian dune construction and accumulation, whereby aeolian deposits cover an earlier succession of coastal coal deposits formed in a more humid period. A prominent aeolian super-surface forms an angular unconformity that divides the aeolian succession into two erg sequences. This super-surface formed in response to a major tectonic reactivation in the basin, and also marks the change in style of aeolian sedimentation from compound climbing crescentic dunes to aeolian draas. The location of the mid-Cretaceous palaeoerg fits well to both the global distribution of other known Cretaceous erg systems and with current palaeoclimate data that suggest a global cooling period and a sea-level lowstand during early mid-Cretaceous times. The occurrence of a sub-tropical coastal erg in the mid-Cretaceous of Spain correlates with the exposure of carbonate platforms on the Arabian platform during much of the Late Aptian to Middle Albian, and is related to this eustatic sea-level lowstand.


英文关键词aeolian sand sea draa dunes interdunes mid-Cretaceous super-surface
类型Review
语种英语
国家Spain ; Netherlands
收录类别SCI-E
WOS记录号WOS:000259237800009
WOS关键词CENTRAL NEUQUEN BASIN ; CEDAR-MESA SANDSTONE ; DUNE-FIELD PATTERNS ; SOUTH-CENTRAL UTAH ; FACE AIR-FLOW ; BOUNDING SURFACES ; EOLIAN DUNES ; DEFORMATION STRUCTURES ; STRATIGRAPHIC EVOLUTION ; SEQUENCE STRATIGRAPHY
WOS类目Geology
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/159169
作者单位1.UCM, CSIC, Grp Anal Cuencas Sedimentarias,CAM, Dept Estratig,Fac Ciencias Geol,Inst Geol Econ, Madrid 28040, Spain;
2.Univ Utrecht, Dept Earth Sci, Sedimentol Grp, NL-3584 CD Utrecht, Netherlands;
3.Univ Zaragoza, Grp Anal Cuencas Sedimentarias Continent DGA, Dept Ciencias Tierra, Fac Ciencias, E-50009 Zaragoza, Spain
推荐引用方式
GB/T 7714
Pedro Rodriguez-Lopez, Juan,Melendez, Nieves,De Boer, Poppe L.,et al. Aeolian sand sea development along the mid-Cretaceous western Tethyan margin (Spain): erg sedimentology and palaeoclimate implications[J],2008,55(5):1253-1292.
APA Pedro Rodriguez-Lopez, Juan,Melendez, Nieves,De Boer, Poppe L.,&Rosa Soria, Ana.(2008).Aeolian sand sea development along the mid-Cretaceous western Tethyan margin (Spain): erg sedimentology and palaeoclimate implications.SEDIMENTOLOGY,55(5),1253-1292.
MLA Pedro Rodriguez-Lopez, Juan,et al."Aeolian sand sea development along the mid-Cretaceous western Tethyan margin (Spain): erg sedimentology and palaeoclimate implications".SEDIMENTOLOGY 55.5(2008):1253-1292.
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