Cementación carbonatada cianobacteriana en un caño mareal del Parque Natural de la Bahía de Cádiz
- F. Pérez Outeiral 1
- María Pilar Mata Campo 2
- Emilio Guillermo Garcia Robledo 1
- Alfonso Corzo Rodríguez 1
- 1 Depto. Biología. Facultad de Ciencias del Mar y Ambientales. Universidad de Cádiz
- 2 Depto. Ciencias de la Tierra. Facultad de Ciencias del Mar y Ambientales. Universidad de Cádiz
ISSN: 1576-5172
Year of publication: 2008
Issue Title: VII Congreso Geológico de España
Issue: 10
Pages: 1457-1460
Type: Article
More publications in: Geotemas (Madrid)
Abstract
A study of the carbonated crust located in a tidal channel close to a hypersaline tidal lagoon of the Nature area of the Bay of Cádiz has been done. A textural, mineralogical, and an experimental study, including O2 y pH measurements have been conducted during a period of a month and a tidal cycle in four different locations along the channel. The results of the mineralogical and textural study and those from the microelectrodes, show how the photosynthetic activity of biofilms dominated by cyanobacteria and diatoms growing in the sediment surface seems to control the calcite precipitation on the intertidal sediments. Although bacterial remains are rarely preserved in beachrocks, this study shows how bacterial activity should be taken into account in beachrock development in coastal environments.