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[hankir]

1. Italian flower - 500 dead in rock (4)
The answer seems to be ADDA , a river. But why is AA=rock?

2. Exchange for money (one small Eastern coin) ??S?

Thanks in advance

[Fibonacci]

1 aa - type of lava having a rough, jagged surface. It is relatively slow moving in its molten state, advancing in the form of massive blocks with fissured and angular surfaces that ride on a viscous interior. The blocks range in size between the size of a football and the size of a house.