Terminology. Many authors prefer the term annular fissure over annular tear, as the latter seems to imply acute injury 1,2. In the setting of severe trauma with disruption of the disc, then the term disc rupture should be used. The term annular gap (referring to a relatively wide annular fissure) is non-standard 2.any authors prefer the term annular fissure over annular tear, as the latter seems to imply acute injury 1,2. In the setting of severe trauma with disruption of the disc, then the term disc rupture should be used.
Sedimentary rocks tend to be more porous than igneous rocks because there is more open space between the individual sediment grains than between the minerals in a crystallized â¦ rock.Porosity of rocks  Consolidated rocks (e.g. sandstone, shale, granite or limestone) potentially have more complex dual porosities, as compared with alluvial sediment.
Most fossils are found in sedimentary rock because it forms in layers so it is easier for the bones or shell of an organism to get trapped between the layers and be preserved.Metamorphic rocks are other rock types that are changed by heat and  pressure; their transformation and mineral reorganization causes  very few fossils to be found there. Sedimentary rock can be formed  from the accumulation of sediments and are often formed near  ancient shores, basins, and lake beds.