Mineral Growth in Magmas at the Surface with Temperatures Around $\circ$

question 14

Multiple Choice

Mineral growth in magmas at the surface with temperatures around 1000 to 1200 ^$\circ$ C occurs in the following way:

• A)Iron and magnesium will link up with aluminum and the silicon-oxygen tetrahedron as magma temperature decreases to sequentially form four distinct and discontinuous families of minerals-olivine,pyroxene,amphibole,and biotite mica.
• B)Calcium will combine with aluminum and the silicon-oxygen tetrahedron to begin forming the plagioclase feldspar family,a continuous and gradational series of minerals.
• C)Both of these are correct.
• D)Neither of these is correct.

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Definitions:

Axial Skeleton

The segment of the skeletal system that is made up of the head and trunk bones, encompassing the skull, spine, ribs, and sternum.

Vertebral Column

A series of connected bones called vertebrae that form the backbone, providing support and protecting the spinal cord.

Cervical Vertebra

One of the seven vertebrae in the human neck, forming the upper part of the spinal column.

Rib Facets

The small, flat surfaces on vertebrae for articulation with the ribs.