Marginal marine spring carbonates defining an emergent rocky shoreline at Cape Freycinet, Western Australia

IF 2.6 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Marine Geology Pub Date : 2025-02-04 DOI:10.1016/j.margeo.2025.107496

Thomas W. Garner , J. Andrew G. Cooper , Alan Smith

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引用次数: 0

Abstract

Modern and Holocene tufa microbialites have been documented globally on groundwater spring-fed supratidal rock coasts. Here, we document the first emergent facies assemblage and demonstrate its utility as a palaeo-shoreline (and sea-level) indicator. At Cape Freycinet, Western Australia, discrete palaeo-spring-associated deposits comprise five distinct facies that collectively define a Quaternary shoreline on a granitic rock coast similar to the contemporary coast. A palaeosol facies, passes laterally seaward into tufa microbialite on sub-horizontal bedrock, associated with oncoids. The most seaward facies is a microbially-cemented sand representing deposition in the upper-intertidal to supratidal zone of a sandy embayed beach, flanked by prominent headlands. A tufa-lithoclast breccia indicates occasional high-energy events. Facies distributions are controlled by bedrock topography in relation to palaeo-sea-level and the distinct suite of marginal marine, springline-associated facies define a Quaternary palaeo-shoreline at ca. +13 m above sea-level. The approach demonstrates the utility of marginal marine microbialite and related carbonate deposits as indicators of Quaternary sea-level on rock coasts.

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来源期刊

Marine Geology 地学-地球科学综合

CiteScore

6.10

自引率

6.90%

发文量

175

审稿时长

21.9 weeks

期刊介绍： Marine Geology is the premier international journal on marine geological processes in the broadest sense. We seek papers that are comprehensive, interdisciplinary and synthetic that will be lasting contributions to the field. Although most papers are based on regional studies, they must demonstrate new findings of international significance. We accept papers on subjects as diverse as seafloor hydrothermal systems, beach dynamics, early diagenesis, microbiological studies in sediments, palaeoclimate studies and geophysical studies of the seabed. We encourage papers that address emerging new fields, for example the influence of anthropogenic processes on coastal/marine geology and coastal/marine geoarchaeology. We insist that the papers are concerned with the marine realm and that they deal with geology: with rocks, sediments, and physical and chemical processes affecting them. Papers should address scientific hypotheses: highly descriptive data compilations or papers that deal only with marine management and risk assessment should be submitted to other journals. Papers on laboratory or modelling studies must demonstrate direct relevance to marine processes or deposits. The primary criteria for acceptance of papers is that the science is of high quality, novel, significant, and of broad international interest.