YELLOWSTONE CALDERA YELLOWSTONE GEOLOGY YELLOWSTONE NATIONAL PARK FLOW STORY OF THERMAL BEGINS FEATURES DEEP AT THE CENTER THE EARTH THE CORE THE MANTLE FINALLY EARTHS CRUST INTEREST FEATURE HEAT HOTSPOT VOLCANIC ACTIVE NUMBER AREAS SOUTHEAST IDAHO CRATERS OF THE MOON NATIONAL MILLIONS MOVEMENT OF THE EARTHS CRUST LIES BENEATH THOUSAND YEARS AGO SENT COLUMN MAGMA TOWARD THE SURFACE FORMING HUGE MAGMA CHAMBER PUSHED UPWARD PRESSURE CRACKS THE EDGE THE DOME ERUPTION EXPELLED TREMENDOUS AMOUNT HUNDREDS CUBIC MILES THE ROOF VIOLENT EXPLOSIONS EVER LAVA CALDERA THE NEXT FILLING AREA THE HEAT REGION VOLCANIC ERUPTIONS THE PAST MILLION YEARS VOLUMES THE ATMOSPHERE MIXTURES VOLCANIC ASH JAGGED FRAGMENTS VOLCANIC GLASS GAS SPREAD PYROCLASTIC FLOWS ALL DIRECTIONS RAPID WITHDRAWAL CAUSED THE GROUND SWALLOWING OVERLYING MOUNTAINS BROAD ERUPTIONS MILLION YEARS AGO DEPOSIT HUCKLEBERRY RIDGE TUFF VIEWED GOLDEN SOUTH MAMMOTH HOT SPRINGS TITANIC THE FIVE LARGEST MILES SMALLER THE HENRYS FORK ISLAND WEST MESA FALLS TUFF RECENT PYROCLASTIC FLOWS LEFT DEPOSITS LAVA CREEK TUFF SEEN IN THE SOUTH CLIFFS EAST THE NORTH WALL BLASTED HIGH EXPLOSIVE LITTLE AS 3 BELOW THE SURFACE VISCOUS DISSOLVED GAS STRESSING CRUST KATMAI NATIONAL PARK WERE TO VAST THE UNITED INJECTION VOLCANIC GASES AFFECT GLOBAL THE YELLOWSTONE SYSTEM SHOWS SIGNS PROBABILITY PAGES BRUCE WEB SITE FINLEY GALLERY WEB HOST SPECIAL THANKS TO DISCUSSION FORUM ADVERTISE PRIVACY POLICY SITE COPYRIGHT SKIP