Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/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
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ISSN | 0037-0746 |
EISSN | 1365-3091 |
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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