read the passage.\ncrystal caves of mexico\nwhile excavating a tunnel under mexicos naica mountain, silver…

read the passage.\ncrystal caves of mexico\nwhile excavating a tunnel under mexicos naica mountain, silver miners were stunned to discover a cavern full of luminous, elongated underground crystals. composed of the mineral gypsum, some of the crystals extended as far as thirty - six feet into the air. what accounted for these amazing mineral structures? millions of years ago, volcanic eruptions released a large amount of mineral - rich water into the cave, now known as the cave of crystals. one of those minerals was anhydrite, which slowly changes into gypsum when exposed to water. originally, the cave was too hot for this change to take place. eventually, however, the temperature cooled to about 136°f, and gypsum crystals began to form. this process continued as the temperature and other conditions in the cave remained constant for thousands of years.\nwhat is the main, or central, idea of the passage?\ngigantic crystals in mexicos cave of crystals were discovered by silver miners who were excavating a tunnel.\nspecific conditions in the cave of crystals led to the development of the enormous crystal structures found there.

read the passage.\ncrystal caves of mexico\nwhile excavating a tunnel under mexicos naica mountain, silver miners were stunned to discover a cavern full of luminous, elongated underground crystals. composed of the mineral gypsum, some of the crystals extended as far as thirty - six feet into the air. what accounted for these amazing mineral structures? millions of years ago, volcanic eruptions released a large amount of mineral - rich water into the cave, now known as the cave of crystals. one of those minerals was anhydrite, which slowly changes into gypsum when exposed to water. originally, the cave was too hot for this change to take place. eventually, however, the temperature cooled to about 136°f, and gypsum crystals began to form. this process continued as the temperature and other conditions in the cave remained constant for thousands of years.\nwhat is the main, or central, idea of the passage?\ngigantic crystals in mexicos cave of crystals were discovered by silver miners who were excavating a tunnel.\nspecific conditions in the cave of crystals led to the development of the enormous crystal structures found there.

Answer

Brief Explanations:

The passage first mentions the discovery of crystals in Mexico's Cave of Crystals by miners. Then it details the geological - historical process of how the crystals formed due to specific conditions like the presence of certain minerals, water, and a particular temperature. The main focus is on the conditions that led to the formation of the crystals, not just the discovery.

Answer:

Specific conditions in the Cave of Crystals led to the development of the enormous crystal structures found there.