Cave development within a paleosol breccia in the dolomitized Seroe Domi Formation, Aruba, Lesser Antilles

• Autores: Jonathan Sumrall, Jeanne L. Sumrall, Ryan W. Travis
• Localización: Carbonates and Evaporites, ISSN 0891-2556, Vol. 31, Nº. 1, 2016, págs. 17-23
• Idioma: inglés
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• Resumen

  • Payoff Cave, found within dolomitized sections of the Seroe Domi Formation on Aruba, provides a set of diagenetic observations unique to island karst. Paleosol breccia found as wall and ceiling rock and as bedrock pillars within Payoff Cave was determined to be low-Mg calcite in mineralogy with clasts of dolomitized host limestone. Payoff Cave is interpreted to be a flank margin (FM) cave based on morphologic features. The relevant diagenetic history of this section of the Seroe Domi is: (1) dolomitization and initial cave formation, (2) collapse and paleosol breccia formation within the initial cave, (3) reoccupation of the mixing zone to form a new FM cave within the more soluble calcitic paleosol breccia, and (4) cliff retreat and exposure of Payoff Cave as found today. Dolomitization, karstification, and the presence of a paleosol breccia combine in a complex diagenetic history on Aruba.