The first are square or rectangular with rounded corners, the base course occasionally consisting of orthostatic slabs.
Near this last site was also found a round hut based on a course of orthostatic slabs of typically megalithic appearance.
They are oval in form and have in many cases a base course of orthostatic slabs.
orthostatic or·tho·stat·ic (ôr'thə-stāt'ĭk)
Relating to or caused by standing upright, as hypertension.