  (1,d)-polarized abelian surfaces in P^(d-1) with two plane cubic curve
fibrations lie in two elliptic P^2-scrolls. The union of these scrolls form a
reducible Calabi-Yau 3-fold. In this paper we show that this occurs when d<10
and analyse the family of such surfaces and 3-folds in detail when d=6. In
particular, the reducible Calabi-Yau 3-folds deform in that case to irreducible
ones with non-normal singularities.
