In stratigraphy, bedrock is the native consolidated rock underlying the surface of a terrestrial planet, usually the Earth. Above the bedrock is usually an area of broken and weathered unconsolidated rock in the basal subsoil. The top of the bedrock is known as rockhead and identifying this, via excavations, drilling or geophysical methods, is an important task in most civil engineering projects. Superficial deposits (also known as drift) can be extremely thick, such that the bedrock lies hundreds of metres below the surface.

Bedrock may also experience subsurface weathering at its upper boundary, forming saprolite.

A solid geologic map of an area will usually show the distribution of differing rock types; i.e., rock that would be exposed at the surface if all soil or other superficial deposits were removed.

Dwayne Michael Carter, Jr. (born September 27, 1982), better known by his stage name Lil Wayne, is an American rapper. At the age of nine, Lil Wayne joined Cash Money Records as the youngest member of the label, and half of the duo, The B.G.'z, with B.G.. In 1997, Lil Wayne joined the group Hot Boys, which also included rappers Juvenile, B.G., and Young Turk. Hot Boys debuted with Get It How U Live! that year. Lil Wayne gained most of his success with the group's major selling album Guerrilla Warfare, released in 1999. Also in 1999, Lil Wayne released his Platinum debut album Tha Block Is Hot, selling over one million copies in the U.S.

Although his next two albums Lights Out (2000) and 500 Degreez (2002) were not as successful (only reaching Gold status), Lil Wayne reached higher popularity in 2004 with Tha Carter, which included the single "Go D.J." Wayne also appeared on the Destiny's Child top ten single "Soldier" that year. In 2005, the sequel to Tha Carter, Tha Carter II, was released. In 2006 and 2007, Lil Wayne released several mixtapes and appeared on several popular rap and R&B singles. His most successful album, Tha Carter III, was released in 2008 and sold over 1 million copies in the U.S. its first week of release. It included the number-one single "Lollipop" featuring Static Major. It also includes the singles "A Milli" and "Got Money" featuring T-Pain and won the Grammy Award for Best Rap Album.

John Digweed (born John Digweed on 1 January 1967 in Hastings, England) is an English DJ, record producer and actor.

John Digweed began DJing at age 15.^{[citation needed]} His breakthrough came in 1993 when he got a gig at the Renaissance Club in Mansfield after fellow DJ Alexander Coe (aka Sasha) heard his demo.

Digweed is known for promoting the progressive house sound that became popular in Europe and North America in the late 1990s and early 2000s, releasing several popular mix compilations on labels like Renaissance and Global Underground. He started the record label Bedrock Records to further promote the music he was playing at the time. In addition to starting the Bedrock imprint, he and friend Nick Muir produce under the Bedrock alias. In his sets, Digweed is noted^{[citation needed]} for adopting tracks with new and different styles.

Between 2000 and 2005, John Digweed promoted his "Bedrock" sound with monthly club nights for members and newcomers to the electronic music scene. He played Thursday nights at Heaven in London and Friday nights at a smaller club night at The Beach in Brighton. These nights featured numerous guest DJs including Danny Howells, Phil Thompson, Hernan Cattaneo, and Chris Fortier. As Digweed's international schedule increased, these events drew to a close, although occasional reunions are still held at Heaven. Digweed celebrated 10 years of his Bedrock club night at Matter, London on 10 October 2008 with a near on 10-hour set.