Before revision: In the Jordà beech forest (in the Garrotxa Volcanic Zone Natural Park ) there are more than 50 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 tossolsItineraris pedestres 2: Sender Joan Maragall - La Fageda d'en Jordà».
After revision: , in Catalunya, Spaintossols (spater cones)In the Jordà beech forest (in the Garrotxa Volcanic Zone Natural Park ) there are more than 50 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 tossolsItineraris pedestres 2: Sender Joan Maragall - La Fageda d'en Jordà».