If you’ve ever tasted ocean water, you know it’s unmistakably salty. But have you ever wondered where all that salt comes from—and why seawater is salty while rivers and lakes remain fresh? The answer lies in a long and complex story involving Earth’s geology, chemistry, and hydrology—playing out over hundreds of millions of years.| Geology In
Chert , a sedimentary rock primarily composed of microcrystalline quartz (silicon dioxide, SiO₂), is recognized for its durability and dist...| Geology In