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A pizza oven is about 450 C, so I’ll figure it out based on this graph of the temperature in the Earth by depth.
0 to 500 C = 80 px
6.25 C per pixel
450/6.25 = 72 px
0 to 100 km = 54 px
1.85 km per pixel
Line y coordinate at 72 px x coordinate = 9 px
9*1.85 = ~17 km
The deepest hole we’ve ever actually drilled is the Kola superdeep borehole, which is a bit over 12 km deep. This is a fair bit short of our ideal pizza oven temperature, but it did see temperatures of 180 C, which is certainly enough to cook a pizza.
15 points
The geothermal gradient is different at different parts of the earth. You can probably bake a pizza at much shallower depths at the mid ocean ridge, near a volcano, or even at an active orogeny.
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450 C is 842 F. A pizza oven doesn’t get anywhere near that temperature. That’s half-way to cremation.
Pizza ovens are usually between 475 and 550 F (246-287C)
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