🌍⛏🕳️⬇️

#deep earth #below ground #earth's interior #subterranean depth #burrowing

🌍🪨

#geological structure #earth layers #strata #cross-section #earth's interior #core mantle crust

🌍🌡️🪨

#geothermal gradient #heat flow #solid earth physics #earth's interior #rock physics #mantle properties

💪❌〰️⚛️

#weak layer #ductile mantle #earth's interior #rheology #geodynamics #low-velocity zone