These granules were formed early on and then have probably been through the gravitational mangle multiple times where they became part of bodies along with younger material. To be broken up, reformed ( probably a number of times), finally only to crash and burn on the surface of our planet. All the material being manufactured by successive generations of stars. There is no glue other than what gravity did to it.
The granules age with respect to our Sun has no significance, The Sun is a mere baby by comparison.