Question

WHAT EVIDENCE HAVE YOU COLLECTED TO EXPLAIN THE RELATIONSHIP BETWEEN SEAFLOOR SPREADING, MID OCEAN RIDGES AND OCEAN TRENCHES IN 1-2 SENTENCES

Answer 1

I collected symmetrical magnetic striping and radiometric ages showing oceanic crust gets older away from mid‑ocean ridges, high heat flow and shallow earthquakes at ridges, plus increasing sediment thickness, deep‑focus earthquakes and volcanic arcs at trenches. These data show mid‑ocean ridges are sites of seafloor spreading where new crust forms and moves outward toward trenches, where old crust is consumed by subduction.