patera

plural paterae

1. A broad, shallow dish used for drinking, primarily in ritual contexts such as libations.
2. architectureA circular ornament, resembling a dish, often worked in relief on friezes etc.
3. The caldera or crater (dish-shaped depression) atop a volcano, especially an extraterrestrial one; also used in the names of extraterrestrial volcanoes which have such a caldera.

   Note that the eroded plains materials to the right of the patera show no signs of individual lava flows.

   2021, Tracy K. P. Gregg, Rosaly M. Lopes, Sarah A. Fagents, Planetary Volcanism across the Solar System, Elsevier, →ISBN, page 89

   1 more example

   What caused the transitions from explosive to effusive volcanism in the Circum-Hellas Volcanic Province generally and during the eruptive lifetimes of individual highland patera volcanoes?

   2020, James R. Zimbelman, David A. Crown, Peter J. Mouginis-Mark, Tracy K. P. Gregg, The Volcanoes of Mars, Elsevier, →ISBN, page 116