Is it a skull? From Madagascar

[madagascar]

This fossil is from the province of Mahazanga, Madagascar.
I looked up some data that may be late Cretaceous strata.
Excuse me, is it a skull?
Is it a dinosaur bone?
Thank you for your answers.

[Troodon]

Not a skull but a bone fragment.  The mahajanga basin has deposits that are mid-jurassic to paleogene.  There are numerous sauropods that it could be but there is nothing diagnostic to say its from one.  Nothing conclusive to even say its dinosaurian.

[madagascar]

22 minutes ago, Troodon said:

不是头骨，而是骨头碎片。mahajanga 盆地有中侏罗纪到古近纪的沉积物。可能有许多蜥脚类恐龙，但没有什么可以诊断的。甚至说它的恐龙时代也没有定论。

This is my first post today.
I have many similar fossils, but I don't know many of them.
Because they're so messy.
Thank you for your answer.