When it has completely melted, they rapidly desiccate and turn black surrounded by a grey aureole.
They are dark with the pale aureole along the middle of the lower edge.
Images often had a flame-shaped aureole, finely curled hair, a slight smile, broad shoulders and an oval face.
But there is no aureole around the head of an inspector.
Hematite of secondary hydrothermal origin is a significant feature of the rock magnetic record in the aureole, which is otherwise dominated by paramagnetism.
Biotite within the contact aureole is free of zircon inclusions.
Granodiorite and aureole sample magnetization behaviours during thermal demagnetization shown as projections of vectors onto the horizontal (closed squares) and vertical (open squares) planes.
Veinlets and disseminations of quartz + sericite + epidote + chlorite + pyrite + pyrrhotite + chalcopyrite are locally developed in the aureole.
