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