The surface of Mars shows a wide range of geologic features, including huge volcanoes-the largest known in the solar system-and extensive impact cratering. Three very large volcanoes are found on the Tharsis bulge, an enormous geologic area near Mars’s equator. Northwest of Tharsis is the largest volcano of all: Olympus Mons, with a height of 25 kilometers and measuring some 700 kilometers in diameter at its base. The three large volcanoes on the Tharsis bulge are a little smaller-a “mere” 18 kilometers high.
None of these volcanoes was formed as a result of collisions between plates of the Martian crust-there is no plate motion on Mars. Instead, they are shield volcanoes — volcanoes with broad, sloping slides formed by molten rock. All four show distinctivelava channels and other flow features similar to those found on shield volcanoes on Earth. Images of the Martian surface reveal many hundreds of volcanoes. Most of the largest volcanoes are associated with the Tharsis bulge, but many smaller ones are found in the northern plains.
- A.They have broad, sloping sides.
- B.They are smaller than the largest volcano on Mars
- C.They have channels that resemble the lava channels of volcanoes on Earth.
- D.They are over 25 kilometers tall.
shield volcanoes내용은 2문단부터 나와서 1문단에 있는 B,D중에 B를 골랐습니다. B과 shield volcanoes와 관련된 있다고 생각하지 않았고, The three large volcanoes on the Tharsis bulge are a little smaller-a “mere” 18 kilometers high. 이 문장에서 근거를 정답 찾을수 있을거 같은데, pharaparashing이 잘 안됩니다. 답은 d이네요