Projects per year
Unit V comprises mostly fine sediments associated with isolated low-sinuosity channels and rare palustrine carbonate beds with immature paleosol development. It is interpreted as a high accommodation systems tract (HAS), in which the available accommodation space is high in relation to the sediment input. On the other hand, Unit VI, contains in the western and northern zones of the basin vertically-stacked carbonate palustrine sequences. These successions are interpreted as occurring within a relatively reduced accommodation area receiving sediment from a source area with more carbonates (low accommodation systems tract or LAS).
Two types of laterally-associated architectural elements are interpreted as palustrine in origin in both units: (1) palustrine carbonates (CPm) and (2) palustrine-lacustrine siliciclastic beds (FPb). These palustrine facies appear laterally and vertically related to the floodplain siliciclastic sediments in Unit V. Facies relationships in Unit VI are difficult to assess because of less extensive exposure.
The interpretation of the palustrine deposits in Units V and VI is based on an extensive review of classic examples of palustrine facies from the geologic record together with modern studies. The features described for some sub-environments in the Florida Everglades (USA) and the Recent sedimentation in Las Tablas de Daimiel wetlands (Spain) are strikingly similar to those of the Guadix Basin palustrine facies. The sedimentologic and petrologic features point to a fluctuating base level with seasonal subaerial exposure. Together with the laterally extensive palustrine beds and the lack of deep lacustrine facies in the area, these deposits can be interpreted as marsh wetlands developed during Pliocene and Pleistocene times in the central sector of the Guadix Basin. To confirm this interpretation and refine paleoclimatic reconstructions, stable isotopic analyses (C,O) will be performed on the palustrine carbonates. The research is funded by projects CGL2009-07830/BTE, AHOB-3 and the Working Group RNM-369JA.
|Number of pages||1|
|Publication status||Published - 2011|
|Event||5th international Limnogeological Congress - Konstanz, Germany|
Duration: 28 Aug 2011 → 3 Sep 2011
|Conference||5th international Limnogeological Congress|
|Period||28/08/11 → 3/09/11|
- Continental carbonates
- Guadix Basin
AHOB3: Ancient Human Occupation of Britain 3. Dispersals of Early Humans: Adaptations, frontiers and new territories
1/10/09 → …
GEOCUSECLA: Geometrical and facies analysis of sedimentary bodies as outcropping analogs for hydrocarbons reservoirs and aquifers: Triassic and neogene examples from south Iberia (II)
Viseras, C., Pla Pueyo, S., Candy, I., García García, F., Soria, J. M., Tent Manclús, J. E. & Fernández Martínez, J.
1/01/10 → 31/12/12