Dieppe's shingle beach obstructed both tanks and landing craft

Was the shingle beach one of the main causes of the losses at Dieppe?

Yes; the shingle impeded both the tanks trying to leave the beach and the landing craft trying to deliver the assault force.

The shingle beach was one cause of the Dieppe disaster. Loose stones made it difficult for Churchill tanks to climb away from the water, and landing craft struggled to approach and unload effectively on the same surface. The terrain problem mattered because the assault lacked the preparation and specialized support needed to overcome it.