Question

Consider the age of the various Hawaiian Islands given below in millions of years. Remember, the formation of the Hawaiian Islands reflects: 1) the movement of the Pacific plate, and 2) stationary volcanic hotspot activity over time. Which direction is the Pacific plate currently moving? Maps are plan or bird's eye views of the earth's surface. Here, the top of the figure is north, and the bottom of the figure is south. The left side of the figure is west, and the right side is east.

4.9 5.1 KAUAI 8/ Aleutian Trench NIHAU OAHU 50" 3.7 2.6 Suiko Seamount 59.6 1.8 MOLOKA Honciulu 1.9 1.3 21 LANAI MAUI Nintoku Seamount 56.2 0.43 KAHOOLAWE 0.8 0.38 Jingu The eight principal islands 20 of the Hawaian Archipelago 55.4 100 150 km 0.15HAWAIL Öjin Seamount 55.2 169 0.01 0.004 Loihi Köko Yuryaku Seamount 19 Guyot 48.1 158 43.4 Midway 27.2 157 Poari & Hermes Reef 20.6 30 Daikakuji Seamount 42.4 Kauai Nihoa Oahu Laysan 19.9 La Perouse Pinnacle Necker 12.0 10.3 Nihau Molokai Maui Hawaii 150 Lanai 170 180 160

Select one: a. Southwest b. South c. Northeast d. Northwest e. Southeast f. North

Last years eruptions emerged from fissures in the East Rift Zone (ERZ) on the big island of Hawaii. This zone is not located at the peak of Kilauea, but instead, near the base. Choose the statement that most accurately describes the tectonic setting of the East Rift Zone (ERZ) on the big island of Hawaii. Hint: To remind yourself the details of the tectonic setting, refer to your Hazard Explorations... Also, it is recommended that you consult a plate tectonic map of the earth (in your text!) to identify the plate tectonic setting at each of the following locations. The figure of Hawaii below shows the shape of the East Rift Zone, which consists of fissures, and the locations of craters that formed along it.

Select one: a. The ERZ is most similar to the East African rift zone, where fissures surrounding Mt. Nyiragongo erupt basaltic lava.

b. The ERZ is most similar to the Mid Atlantic Ridge which erupts basaltic lava from fissures.

c. The ERZ is most similar to mid oceanic rifts on Iceland, which erupt curtains of basaltic lava.

d. The ERZ is most similar to fissures along the mid oceanic East Pacific Rise which erupt basaltic lava. e. The ERZ is most similar to fissures in the Snake River plain of Idaho, which erupted basaltic lava.

Answer 1

North 4.9 5.1 rthwest KAUAI renc OAHU 50 NIHAU 3.7 2.6 Suiko Se 1.8 amount 59.6 MOLOKA Honciulu 19 1.3 21 LANA MAUI Nintoku Seamount 56.2 0.43 KAHOOLAWE 08 a 0.38 The eight principal islands Jingu Seamount0of the Hawaian Archipelago 55.4 st 160 150 km 0.15 HAWAIE Öjin Seamount 55.2 0.01 ,0.004 Kökò Guyot 48.1 Yüryaku Seamount 19 Loihi 158 43.4 Midway 27.2 157 156 155 Hermes Reef 20.6 Daikakuji Seamount 42.4 Kauai Nihoa Oahu Laysan 19.9 West La Perouse Pinnacle Necker 12.0 Molokai Ma uth 10.3 Nihau 170" 1a0 170 150

The direction of motion of pacific plate is Northwest as shown in the above figure.

The answer is "ERZ is the most similar to mid oceanic ridge on the Iceland, which erupt curtains of basaltic lava.

Because the it is also an oceanic hotspot that has similar to Hawaiian hotspot. Both are oceanic hotspots in which magma erupts from deep mantle plumes.