Page 102 - pet225ebook
P. 102
Practice 6
Complete the text below by choosing the
correct prepositions
Long before any recorded human history in Yellowstone
National Park, a massive volcanic eruption spewed an
immense volume ………. ash that covered all of the western
U.S., much ………. the Midwest, northern Mexico and some
areas of the eastern Pacific Coast. The eruption dwarfed
that of Mt. St. Helens ………. 1980 and left a huge caldera.
Yellowstone typically erupts every 600,000 ………. 900,000
years with the last event occurring 640,000 years ago. Its
eruptions are among the largest known to have ever
occurred ………. Earth, producing drastic climate change
………. the aftermath. The park was named ………. the yellow
rocks seen ………. the Grand Canyon of the Yellowstone - a
deep gash in the Yellowstone Plateau that was formed
………. floods during previous ice ages and ………. river
erosion from the Yellowstone River.
Source:
http://en.wikipedia.org/wiki/Yellowstone_National_Park
