Ключевые слова: boiling dirt, brown, bubble, caldera, carbon dioxide, closeup, decorative, detail, difficult to access, dirty, environment protection, extremophile, geological processes, geothermal field, gryphon, hot springs, hydrocarbons, igneous volcanoes, kamchatka peninsula, landform, magmatic activity, methane, mud dome, mud volcano, natural, natural sciences, nature, ornamental, vacation, valley of geysers,