“A sawn and partially polished surface (wet), cut parallel to bedding, of lapillistone (deposit of chilled calciocarbonatite lava droplets). A few dark lapilli of nephelinite are also present. Collected from outcrop somewhere on the Kaiserstuhl volcano.”

“A sawn and partially polished surface (dry), cut parallel to bedding, of lapillistone (deposit of chilled calciocarbonatite lava droplets). A few dark lapilli of nephelinite are also present. Collected from outcrop somewhere on the Kaiserstuhl volcano.”

“A natural bedding plane surface of lapillistone (deposit of chilled calciocarbonatite lava droplets). A few dark lapilli of nephelinite are also present. Collected from outcrop somewhere on the Kaiserstuhl volcano.”

“Thin section, in plane polarized light, of chilled carbonatite melt lapilli containing irregular calcite microphenocrysts, in a calcite cement.”

“Thin section, with crossed polars, of chilled carbonatite melt lapilli containing irregular calcite microphenocrysts, in a calcite cement.”