. 2013 Jun;13(6):550–559. doi: 10.1089/ast.2012.0817

Table 1.

Planet Parameters for Calculating FeO Formation Rates

Variable	Exponent	1 M_⊕^a	5 M_⊕^b
Ridge length (l)	0.28	7×10⁷ m	1.1×10⁸ m
Crust thickness (d)	−0.45	2600 m	1260.2 m
Spreading rate (S_c)	1.19	2 cm yr⁻¹	13.6 cm yr⁻¹

^{^a}

Total length of the ridges and average crustal thickness from Macdonald (2001), average spreading rate sustained on Earth during the last ∼150 million years (Cogné and Humler, 2004, and references therein).

^{^b}

Calculated from Valencia et al. (2007a); see text.