tuff ring उदाहरण वाक्य
उदाहरण वाक्य
- The scoria cone sits in the centre of a large explosion ( maar ) crater with the tuff ring arc still present around the south and east sides.
- It created a 200-meter hole in the east-northern border of the tuff ring, and then emptied, creating a small trachyandesitic lava flow.
- The first eruptive period produced a tuff ring and a } } long basaltic andesite lava flow about 100, 000 years ago following a period of glacial retreat.
- Even higher water levels are recorded on the tuff cliffs and at one point only the tops of the tuff ring were exposed as rocky islands in this inland sea.
- It has an explosion crater around 500 m wide, and tuff ring up to 30 m high, which has been eroded away on the south-western side.
- The park is home to one of Auckland's main tourist attractions, the Auckland War Memorial Museum, which sits prominently on the crater rim ( tuff ring ).
- Over time Surtseyan eruptions tend to form maars, broad low-relief volcanic craters dug into the ground, and tuff rings, circular structures built of rapidly quenched lava.
- Strombolian eruptions during the second and final eruptive period about 10, 000 years ago constructed a small pyroclastic cone on the eastern rim of the older basaltic andesite tuff ring.
- The ages of the Grafton and Domain volcanoes are not known precisely, although a tree under the Domain tuff ring was radiocarbon dated at over 50, 000 years old.
- While at higher elevations cinder cones predominate, the western tip of the island is characterized by a series of basaltic tuff rings, of which the largest is about in diameter.