The granite dome in Twain Harte was damaged by the growth of joints, likely due to .

The granite dome in Twain Harte was damaged by the growth of exfoliation joints, likely due to thermal expansion.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.