Beachrock is a friable to well-cemented sedimentary rock that consists of a variable mixture of gravel-, sand-, and silt-sized sediment that is cemented with carbonate minerals and has formed along a shoreline. Depending on location, the sediment that is cemented to form beachrock can consist of a variable mixture of shells, coral fragments, rock fragments of different types, and other materials. It can contain scattered artifacts, pieces of wood, and coconuts. Beachrock typically forms within the intertidal zone within tropical or semitropical regions. However, Quaternary beachrock is also found as far north and south as 60' latitude.

Beachrock units form under a thin cover of sediment and generally overlie unconsolidated sand. They typically consist of multiple units, representing multiple episodes of cementation and exposure. The mineralogy of beachrocks is mainly high-magnesium calcite or aragonite. The main processes involved in the cementation are : supersaturation with CaCO₃ through direct evaporation of seawater (Scoffin, 1970), groundwater CO₂ degassing in the vadose zone (Hanor, 1978), mixing of marine and meteoric water fluxes (Schmalz, 1971) and precipitation of micritic calcium carbonate as a byproduct of microbiological activity (Neumeier, 1999).

Rock usually refers to:

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The Beach Boys are an American rock band, formed in 1961 in Hawthorne, California. The group was initially composed of brothers Brian, Dennis and Carl Wilson, their cousin Mike Love, and friend Al Jardine. They were managed early on by the Wilsons' father, Murry. The band's leader, composer, arranger and producer Brian Wilson was responsible for writing most of the band's early singles and albums. After signing with Capitol Records in mid-1962, Wilson wrote or co-wrote more than two dozen Top 40 hits including "Surfin' Safari", "Surfin' USA", "Surfer Girl", "Little Deuce Coupe", "Be True to Your School", "In My Room", "Fun, Fun, Fun", "I Get Around", "Dance Dance Dance", "Help Me Rhonda" and "California Girls". These songs and their accompanying albums were internationally popular, making The Beach Boys one of the biggest acts of their time. The band's early music gained popularity across the United States for its close vocal harmonies and lyrics reflecting a Southern California youth culture of surfing, cars, and romance. By the mid-1960s, Brian's growing creative ambition and songwriting ability would dominate the group's musical direction. The primarily Brian-composed Pet Sounds album and "Good Vibrations" single (both released in 1966) featured a complex, intricate and multi-layered sound.