Pumice in Mangrove Roots

Pumice is the air-filled rock ejected by volcanoes during eruptions. The naturally-occurring pumice originated elsewhere, but can be found scattered on the beaches and mangroves of Belize. Here it is perched upon some mangrove prop roots. 
(Dr. Maggie Toscano, Smithsonian)

Pumice is the air-filled rock ejected by volcanoes during eruptions. The naturally-occurring pumice originated elsewhere, but can be found scattered on the beaches and mangroves of Belize. Here it is perched upon some mangrove prop roots.