Keywords: Granada scoria layers.jpg Oxidized scoria layers in a cinder cone of the fissure-fed Granada in Nicaragua http //www volcano si edu/world/volcano cfm vnum 1404-101 volpage photos photo 082033 1998 Lee Siebert Smithsonian Institution PD Smithsonian Institution is administered by the U S government Photos taken by Smithsonian Institution's employees are thus without restriction confirmed by Mr Edward Venzke from Smithsonian Institution PD-USGov Volcanoes of Nicaragua Scoria Pyroclastic cones Outcrops in Nicaragua |