Question

The age of material on a tectonic plate depends in part on what type of crust it is composed of.
Oceanic crust
tends to be younger because it is continually produced at the
hot spots
and then recycled. On the other hand,
continental crust
tends to be older because it can often remain intact for longer periods.

Answer 1

Nice summary — one small but important correction and a bit of added context.

Correction:
- Oceanic crust is produced mainly at mid-ocean ridges (spreading centers), not primarily at hot spots. Hot spots do create new crust locally (e.g., the Hawaiian Islands), but the bulk of oceanic crust is born at spreading ridges and then moves outward.

Why oceanic crust is generally younger
- New basaltic oceanic crust forms at mid-ocean ridges and records symmetric magnetic stripes from seafloor spreading.
- Oceanic crust is relatively thin and dense (mafic), so it is readily recycled back into the mantle at subduction zones. As a result, almost all oceanic crust is less than ~200 million years old.

Why continental crust is generally older
- Continental crust is thicker and more buoyant (more felsic composition), so it resists subduction and can survive for much longer.
- Pieces of continental crust can persist for billions of years; the oldest continental rocks are ~4 billion years old. Continual growth and reworking by magmatism, sedimentation, and tectonics produce complex, long-lived continental regions.

Evidence and examples
- Seafloor magnetic striping and age dating show increasing age away from mid-ocean ridges.
- Hot-spot chains (Hawaii, Yellowstone track) demonstrate intraplate volcanism and age progression, but they are not the primary source of the global oceanic crust budget.

If you’d like, I can rewrite your paragraph with these corrections or add a diagram-friendly explanation of the processes.