Saucer sills and sand injectites

Ponders the origins of channel-like structures in New Zealand that mound overlying sediments, with features for which the commonly-accepted interpretation is that they are saucer-shaped igneous sill injections. Proposes that a third saucer structure may be common in the subsurface in addition to saucer sills and sand injectites; namely a composite of igneous sill and sedimentary injectite. Source: National Library of New Zealand Te Puna Matauranga o Aotearoa, licensed by the Department of Internal Affairs for re-use under the Creative Commons Attribution 3.0 New Zealand Licence.