Because of a tide probably or rain
I agreed with him for 100%
Weathering of rocks and soil is the primary way that clays and clayminerals form at the Earth's surface today. ... Factors governing rockweathering and soil formation include the initial type of rock, the ratio of water to rock, the temperature, the presence of organisms and organic material, and the amount of time
The type of ion channels responsible for the depolarization phase of an action potential are Na+ (sodium)
channels. Sodium ions flow inward through the sodium channels and cause an
increase in the concentration of positively charged ions in the cell; this in
turn, leads to depolarization.
