Features of Jurassic dolerite intrusions at Cape Surville, Lynwood, Single Hill and Mount Nelson, Tasmania

The intrusive features associated with the Jurassic dolerites of Tasmania are generally well displayed, but rarely is more than one feature visible at anyone site. The great range of characters can, however, be reviewed and inspected by visiting only four sites. Each site provides information which can constrain any hypotheses for mechanisms of emplacement and suggests a multiphase fracture-controlled injection.