Abstract
Maar-craters are volcanically produced, but they are preserved as sedimentary deposits that reflect (1) the depositional environment into which these volcanoes erupted and (2) post-eruptive sedimentary environments in the surrounding area. Study of maar-crater deposits in the Hopi Buttes volcanic field, Arizona, show that volcanoes there erupted into a broad playa, and their craters were subsequently filled by complex sedimentary packages of reworked eruption ejecta, laminated lacustrine carbonates, and clastic sediment (including reworked tuff) from outside the craters. Data from the Hopi Buttes deposits are used to formulate a model for crater sedimentation in playa settings, applicable to interpretation of other maar-crater deposits.
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