Medium-grained rocks can be composed of quartz grains, feldspar grains (arkose), or rock fragments and clay (graywacke). Sandstone (Photograph by Parvinder Sethi). Medium-sized grains in clastic sedimentary rocks form sandstone. This sample is a quartz sandstone.
Bliss â¢ McCabe: Discourse Genres 135 special interests and can give lengthy descriptions ofrelevant objects such as rocks or music).â¢ We have identified the following components thatappear to be necessary for a complete proceduraldiscourse regarding how a game is played: goals,players, materials, and procedures.
1 Dialogue: Spoken exchanges between characters in a dramatic or literary work, usually between two or more speakers. 2  Genre: A kind of literature. 3  For instance, comedy, mystery, tragedy, satire, elegy, romance, and epic are all genres. 4  Texts frequently draw elements from multiple genres to create dynamic narratives.