[1850â55; probably < Shelta mÅ­nnik name (alleged to be a permutation and extension of Irish ainm name)] - Originally meant a mark left by a tramp on a building or fence to indicate he/she had been there; therefore, a tramp's moniker identified him/her like a signature.
Define laccolith: a mass of igneous rock that is intruded between sedimentary beds and produces a domical bulging of the overlying strata a mass of igneous rock that is intruded between sedimentary beds and produces a domical bulging of the overlying strataâ¦ See the full definition
They can be contrasted with sills, which are sheetlike intrusions oriented parallel to the bedding of the enclosing rock: a laccolithâs ratio of diameter to thickness should be less than 10; a larger ratio would make the body a sill. Acidic rocks are more common than basic rocks in laccoliths. Although the lower portions of laccoliths are seldom visible, they usually are interpreted as having a relatively small feeder from a magma source below. A well-known example of a laccolith is found in the Henry Mountains, Utah.