Caprock

Caprock or cap rock is a harder or more resistant rock type overlying a weaker or less resistant rock type. Common types of caprock are sandstone and mafic rock types. In processes such as scarp retreat, the caprock controls the rate of erosion of the scarp. As the softer rock is cut away, periodically the caprock shears off. Caprock is also found on the top of mesa formations.

The Niagara Escarpment, over which Niagara Falls flows, is an example of a scarp or escarpment. At Niagara Falls, the caprock is the riverbed above the falls, and is what prevents the river from eroding the face of the falls very quickly. In the photo, the dark thin layer in the foreground where water is not yet running, is the caprock. The Niagara caprock is made of dolomitic limestone (dolostone). An analogy of caprock could be the outer crust on a cake that is a bit harder than the underlying layer.

Petroleum

In the petroleum industry, caprock is any nonpermeable formation that may trap oil, gas or water, preventing it from migrating to the surface. This caprock or trap can create a reservoir of oil, gas or water beneath it and is a primary target for the petroleum industry.

Demi Lovato

Demetria Devonne "Demi" Lovato (/ˈdɛmi loʊˈvɑːtoʊ/ DEM-ee loh-VAH-toh or lə-VAH-toh) (born August 20, 1992) is an American singer, songwriter, actress and model who made her debut as a child actress in Barney & Friends. In 2008, Lovato rose to prominence in the Disney Channel television film Camp Rock and signed a recording contract with Hollywood Records. Musically, Lovato is considered a pop and pop rock. She released her debut album, Don't Forget, that September; it debuted at No. 2 on the U.S. Billboard 200 and has been certified gold by the Recording Industry Association of America (RIAA) for sales of over 530,000 copies. In 2009, Lovato received her own television series, Sonny with a Chance. Her second album, Here We Go Again, was released that July and debuted at number one on the U.S. Billboard 200, and it has been certified gold by the Recording Industry Association of America (RIAA) for sales of over 650,000 copies. Its title track became her first single to break the top 20 of the Billboard Hot 100, reaching number 15, and was certified platinum.

Joe Jonas

Joseph Adam "Joe" Jonas (born August 15, 1989) is an American singer and actor. Jonas first rose to fame as a member of the pop-rock band Jonas Brothers, along with his brothers Kevin and Nick. The band's debut album, It's About Time (2006), was a commercial failure following a limited release. The group signed with Hollywood Records, and in 2007 released their eponymous second studio album. The album went on to be a commercial success for the group, selling over two million copies in the United States alone. The group became heavily involved with the Disney Channel, and later made their film debut in the Disney Channel Original Movie Camp Rock (2008). The film, and its soundtrack, became a major hit for the network, and helped propel the brothers into further commercial success. Their third studio album, A Little Bit Longer (2008), became their first to top the Billboard 200, and went on to become their highest selling album to date. The album's lead single became a top five hit in the United States. Their fourth studio album, Lines, Vines and Trying Times (2009) became their second to top the charts in the United States. The brothers also starred in two of their Disney Channel series from 2009 to 2010, being JONAS L.A. and Jonas Brothers: Living the Dream. In 2010, the group starred in Camp Rock 2: The Final Jam, reprising their roles from the original film.