Stratiform stromatolites of lagoa Pernambuco, Rio de Janeiro, Brazil
Abstract
The Pernambuco Lagoon is located between 22°55’31” - 22°56’02” S and 42°20’21” - 42°17’26” W, in the northeastern portion of Rio de Janeiro State, Brazil, being its formation related to the last Holocene transgression. The aim of this study was to characterize the cyanobacteria assemblage in the stratiform stromatolites found on the floor of Pernambuco Lagoon. 31 species of cianobactéria were found, the Family Chroococcaceae Nägeli 1849 being the most frequent, representing 32,2% of the total assemblage, followed by Phormidiaceae Anagnostidis and Komárek 1988. The other families are Synechococcaceae, Schizothricaceae Elenkin 1934, Oscillatoriaceae, Merismopediaceae, Pseudanabaenaceae, and Nostocaceae. Microcoleus chthonoplastes (Thuret) Gomont 1892 and Chroococcus minutus Keissler 1901 are the dominant species. Understanding the modern environmental and climatic conditions that control the lagoon genesis in the coastal plain of Southeast Brazil, with seasonal marine influence and warm and dry climate are important in the comprehension of the past requirements needed to the establishment of the stratiform stromatolites.
Key words: stratiform stromatolites, cyanobacteria, Pernambuco Lagoon, Rio de Janeiro, Brazil.Downloads
Published
Issue
Section
License
I grant the journal Gæa – Journal of Geoscience the first publication of my article, licensed under Creative Commons Attribution license (which allows sharing of work, recognition of authorship and initial publication in this journal).
I confirm that my article is not being submitted to another publication and has not been published in its entirely on another journal. I take full responsibility for its originality and I will also claim responsibility for charges from claims by third parties concerning the authorship of the article.
I also agree that the manuscript will be submitted according to the journal’s publication rules described above.
