Sedimentary breccia is a type of clastic sedimentary rock which is made of angular to subangular, randomly oriented clasts of other sedimentary rocks.
Conglomerate is a clastic sedimentary rock that contains large (greater than two millimeters in diameter) rounded clasts. The space between the clasts is generally filled with smaller particles and/or a chemical cement that binds the rock together. Conglomerate can have a variety of compositions. The rounded clasts of conglomerate can be mineral particles such as quartz or they can be sedimentary, metamorphic or igneous rock fragments. The matrix that binds the large clasts together can be a mixture of sand, mud and chemical cement. Breccia is a rock formed from angular gravel and boulder-sized clasts cemented together in a matrix. The angular nature of the clasts indicates that they have not been transported very far from their source. There are several modes of formation for breccia. The cement that binds the clasts in a breccia is generally one of either calcite, silica or iron oxide. The matrix can consist solely of the cementing material, but may also contain sand and / or silt sized clasts cemented together among the coarser clasts. Breccia can be further divided according to: Clastic sedimentary rocks contain clasts. These are fragments or pieces of rock or minerals. The composition of clastic sedimentary rocks is divided into three types-clay/silt, sand and gravel. Clay and silt are less than 1/16 mm. These are not visible to the unaided eye. Sand is clasts between 1/16 and 2 mm in size, and gravel is greater than 2 mm. Breccia is a clastic sedimentary rock composed of angular fragments of rocks and rock particles that have been lithified (cemented together). Breccia also has large fragments of rock. Conglomerate is a clastic sedimentary rock composed of rounded fragments of rocks and rock particles that have been lithified. Breccia is usually formed closer geographically to the point of origin of the rock fragments than are the rock fragments in conglomerate.  As a clastic sedimentary rock it can contain clasts of any rock material or weathering product that is washed downstream or down current. The rounded clasts of conglomerate can be mineral particles such as quartz or they can be sedimentary, metamorphic or igneous rock fragments. The matrix that binds the large clasts together can be a mixture of sand, mud and chemical cement. Conglomerate /kəŋˈɡlɒmərɨt/ is a coarse-grained clastic sedimentary rock that is composed of a substantial fraction of rounded to subangular gravel-size clasts, e.g., granules, pebbles, cobbles, and boulders, larger than 2 mm (0.079 in) in diameter. Conglomerates form by the consolidation and lithification of gravel.  After deposition the fragments are bound together by a mineral cement or by a matrix of smaller particles that fills the spaces between the fragments. Breccia and conglomerate are very similar rocks. They are both clastic sedimentary rocks composed of particles larger than two millimeters in diameter. The difference is in the shape of the large particles. Most breccias are a mix of rock fragments and mineral grains. The type of rock that the fragments were produced from is often used as an adjective when referring to the rock. Some examples: sandstone breccia, limestone breccia, granite breccia, chert breccia, basalt breccia and others. Sedimentary [edit]. Sedimentary breccia is a type of clastic sedimentary rock which is made of angular to subangular, randomly oriented clasts of other sedimentary rocks. A conglomerate, by contrast, is a sedimentary rock composed of rounded fragments or clasts of pre-existing rocks. Both breccia and conglomerate are composed of fragments averaging greater than 2 millimetres (0.079 in) in size Conglomerates and Breccias A clastic rock made of particles larger than 2 mm in diameter is either a conglomerate or breccia. A conglomerate has rounded clasts while a breccia has angular clasts. Since water transport rapidly rounds large clasts, breccias normally indicate minimal transport. They commonly form as rock-fall and debris flow deposits along cliffs, and underground along faults or where caves collapse.
http://geology.com/rocks/conglomerate.shtml http://flexiblelearning.auckland.ac.nz/rocks_minerals/rocks/breccia.html http://facweb.bhc.edu/academics/science/harwoodr/geol101/Labs/Sediment/index.htm http://www.answers.com/Q/What_is_the_difference_between_breccia_and_conglomerate http://geology.com/rocks/conglomerate.shtml https://en.wikipedia.org/wiki/Conglomerate_(geology) http://geology.com/rocks/breccia.shtml https://en.wikipedia.org/wiki/Breccia http://www.pitt.edu/~cejones/GeoImages/5SedimentaryRocks/ClasticSedRocks/ConglomeratesBreccias.html
do breccia contain clasts?