Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sample items from the four cross-section tests used in this research. (A) Santa Barbara Solids Test (SBST) item (B) Crystal Slicing Test (CST) item (C) Planes of Reference Test (PRT) item (D) Geologic Block Cross-Sectioning Test (GBCST) item.
