Asked by Andrews Osei antwi on Apr 24, 2024
Verified
Which of the following igneous rocks is NOT characteristic of mid-ocean ridges?
A) finely crystalline rocks that formed in dikes
B) gabbro that solidified in a magma chamber
C) pillow basalt
D) andesite and granodiorite
Mid-ocean Ridges
Underwater mountain ranges formed by the upwelling of magma where tectonic plates are diverging, key sites of seafloor spreading.
Granodiorite
A coarse-grained igneous rock similar to granite but with more plagioclase feldspar compared to orthoclase feldspar.
Pillow Basalt
A basaltic lava flow that includes pillow structures.
- Learn about the initiation and peculiarities of various igneous operations and manifestations, including magmas from subduction zones, rift zones on continents, and ridges in the mid-ocean.
Verified Answer
BS
Binayak singh7 days ago
Final Answer :
D
Explanation :
Andesite and granodiorite are not characteristic of mid-ocean ridges; they are more commonly associated with volcanic arcs related to subduction zones, not the spreading centers found at mid-ocean ridges. Mid-ocean ridges typically feature basaltic compositions, such as pillow basalts, and gabbros from the cooling of magma chambers.
Learning Objectives
- Learn about the initiation and peculiarities of various igneous operations and manifestations, including magmas from subduction zones, rift zones on continents, and ridges in the mid-ocean.