Which process involves sea spray or salty groundwater penetrating crevices and pore spaces in rocks, leading to salt crystal growth that enlarges the crevices?

Which process involves sea spray or salty groundwater penetrating crevices and pore spaces in rocks, leading to salt crystal growth that enlarges the crevices?

• A. Salt Crystal Growth
• B. Biological Activity
• C. Hydration
• D. Oxidation

Answer: (A)

Salt crystal growth is the process at work here. When sea spray or salty groundwater enters cracks and pore spaces in rock, salt is dissolved in the water. As the water expands or evaporates, the dissolved salt precipitates and forms crystals. These crystals grow and push against the rock walls, gradually prying the crevices wider. Repeated cycles of dissolution, diffusion, and crystallization power this physical weathering and can eventually break the rock apart. This differs from hydration, which involves minerals swelling as water is taken up into their structure; oxidation, which is a chemical change from reacting with oxygen; and biological activity, which is rock breakdown caused by organisms. The scenario specifically describes crystallization pressure from salt, making it the best fit.

Salt crystal growth is the process at work here. When sea spray or salty groundwater enters cracks and pore spaces in rock, salt is dissolved in the water. As the water expands or evaporates, the dissolved salt precipitates and forms crystals. These crystals grow and push against the rock walls, gradually prying the crevices wider. Repeated cycles of dissolution, diffusion, and crystallization power this physical weathering and can eventually break the rock apart.

This differs from hydration, which involves minerals swelling as water is taken up into their structure; oxidation, which is a chemical change from reacting with oxygen; and biological activity, which is rock breakdown caused by organisms. The scenario specifically describes crystallization pressure from salt, making it the best fit.