Definition

number base = 10

Description

The term "base" refers to the number which is set to incremental powers to determine the ticks on the axis.
The tick values, if base = b, would be b^x where x is the linear incremental power.

When base = 10, and your range is 10 - 10,000, the tick marks would be:

10^1 = 10
10^2 = 100
10^3 = 1,000
10^4 = 10,000