How does the geography of the gulf coastal plain affect mexico's economy? earthquakes and volcanoes make the area unstable.

the mountains keep rainfall from the area.

oil and natural gas underlie the area.

the porous bedrock of the area creates sinkholes.

Answer decreased soil salinity;

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.

Answer light in color; silica-rich;