Ambientes de Formação, Processos de Cimentação de Arenitos de Praia e Indicadores de Variações do Nível do Mar (Environments of Formation, Processes of Cementation of Beachrocks and Indicators of Sea Level Variations)

O artigo contem revisao bibliografica sobre origem e ambiente de formacao dos arenitos de praia, assunto hoje em discussao no meio cientifico. Com base em diversos autores, busca-se apresentar os ambientes de formacao e respectivos processos de genese, tanto fisico-quimicos quanto por atividade microbiana destacando os processos de cimentacao e seu papel enquanto indicadores de antigos niveis marinhos. Palavras-chave: Arenitos de praia, diagenese, cimentacao, nivel do mar. Environments of Formation , Processes of Cementation of Beach rocks and Indicators of Sea Level Variations ABSTRACT This paper contains a literature review on the origin and environment of formation of beachrocks, a very relevant topic of discussion within the scientific community. Based on various authors, we seek to present the environments of formation and their genesis processes, both physical-chemical and by microbial activity, highlighting on the cementing processes and their role as indicators of older sea levels. Keyswords: Beachrocks, diagenesis, cementation, sea level.