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ACROSS
1)  a lump or mass of hard consolidated mineral matter
2)  a small island
3)  the scum formed by oxidation at the surface of molten metals
4)  the longest division of geological time


DOWN
1)  a growth in strength or number or importance
2)  the capital and largest city of norway; the country's main port; located at the head of a fjord on norway's southern coast
3)  group of people related by blood or marriage
4)  the quantity contained in a keg

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rock
isle
slag
eons