: a measure of acidity and alkalinity of a solution that is a number on a scale on which a value of 7 represents neutrality and lower numbers indicate increasing acidity and higher numbers increasing alkalinity and on which each unit of change represents a tenfold change in acidity or alkalinity and that is the negative logarithm of the effective ...
Sandstone: Rock for Crack Climbing. Sandstone is a sedimentary rock, a rock type that encompasses a wide variety of characteristics and is deposited directly on the earthâs surface. Roughly 75% of the earthâs land surface is covered with some type of sedimentary rock. Sedimentary rocks like sandstone form when minute rock particles, often from granite, are deposited by wind and water on earth surfaces.
Â· just now. Report Abuse. sandstone is a common sedimentary rock .sedimentary rocks are rocks formed from sediments, such as fragments of rocks worn from the land (clastic rocks). the remains of once-living things (organic rocks) or from chemicals precipitated from water. just now. Report Abuse. sandstone is a common sedimentary rock .sedimentary rocks are rocks formed from sediments, such as fragments of rocks worn from the land (clastic rocks). the remains of once-living things (organic rocks) or from chemicals precipitated from water.