Tossol
Tossol is a Catalan word used to refer to protuberances that form in lava flows and that when the lava cools become small hills. In the Jordà beech forest there are more than 50 tossols formed by the interaction between lava flows and pre-existing wetlands that, when covered by lava at more than 1000 °C, boiled with large bubbles that raised and deformed the flow forming the tossols. These in the Garrotxa Volcanic Zone are found in three lava flows, that of the Croscat volcano, that of the Puig Jordà volcano, that of the Montolivet volcano and the lava flow located in La Moixina and the Parc Nou in Olot.