### Question
Can you define what tar sand means?


### Answer
**Tar sand** is defined as the following in *30 U.S.C. § 209*:

> any consolidated or unconsolidated rock (other than coal, oil shale, or gilsonite) that either: (1) contains a hydrocarbonaceous material with a gas-free viscosity, at original reservoir temperature, greater than 10,000 centipoise, or (2) contains a hydrocarbonaceous material and is produced by mining or quarrying

#### Citation:
  - *30 U.S.C. § 209*
  - Heading: **CHAPTER 3A-LEASES AND PROSPECTING PERMITS > SUBCHAPTER II-COAL**

