Hot Spring hot tubs has certified all models to the California Energy Commission (CEC) in accordance with California law. With California setting the standard for energy-efficient hot tubs, you can have peace of mind knowing that your spa is designed to keep operating costs low no matter where you live. Hot Spring Spas received the ENVY Award for energy-efficient hot tub design in 2008.
A sedimentary rock is a layered rock that is formed from the compaction, cementation, and the recrystallization of sediments. Compaction is the squeezing together of layers of sediment due to the great weight of overlying layers of rock.
This article discusses how rocks are formed. There are also articles on physical rock formations, also known as strata, and the formal naming of geologic formations.The three main ways rocks are formed 1  : Sedimentary rocks are formed through the gradual accumulation of sediments: for example, sand on a beach or mud on a river bed. Sedimentary rocks are formed through the gradual accumulation of sediments: for example, sand on a beach or mud on a river bed. 2  As the sediments are buried they get compacted as more and more material is deposited on top. 3  Eventually the sediments will become so dense that they would essentially form a rock.