# Is weathering of rock a primary means of $\text{CO}_2$ scrubbing on primordial Earth?

I read somewhere that the reason Venus has a runaway greenhouse effect and Earth doesn't is because Venus failed to develop tectonic plates and instead formed a full tectonic plate enveloping the entire planet. And as such, Venus cannot scrub $$\mathrm{CO}_2$$ from its atmosphere by burying the weathered rock back into the mantle while Earth can, which eventually caused a positive feedback loop of high temperature softening plate preventing fracture which prevents burying of $$\mathrm{CO}_2$$, which puts more $$\mathrm{CO}_2$$ in the atmosphere, which raises the temperature even more. Regardless of the truthfulness of this theory, is the weathering of rock a primary mechanism of $$\mathrm{CO}_2$$ scrubbing on red-hot primordial Earth long before life occurred?

• It would be great if you can add the source where you did read all that. – Camilo Rada Mar 13 '19 at 23:12
• Looks like OP has long given up :-) – ebv Jan 5 at 20:27