obtain location of groups of data points

Hi,

I have a big matrix T where all its values are zero except some areas where its value range between 0.8 and 1. These areas are grouped (no zero values within them) and separated from each other by zero values. How can I find their locations and group them separately? i.e A(loc_group1, loc_group2, ... ) = [val_group1, val_group2, ....]

pd: I attached the matrix T.

thanks