Symbol in context

$R_t$

This entry links every published equation using this exact notation. Its meaning may change between equations.

Meanings in context

Article-grounded definition

each mineral’s measured present-day strontium-87 to strontium-86 ratio.

R_t = R_0 + \frac{N_{87}}{N_{86}}\left(e^{\lambda t} - 1\right),

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

R_t

each mineral’s measured present-day strontium-87 to strontium-86 ratio.