This is a compilation of extended abstracts submitted for the 9th Three-Dimensional (3D) Geological Mapping Workshop held at the Geological Society of America Annual Meeting in Baltimore, Maryland on October 31, 2015. This is the latest in a series of workshops that began in 2001.

The focus of the workshop was on how various geoscience organizations and their partners are characterizing subsurface strata in 3D space at a variety of scales for multi-disciplinary analysis, and developing dissemination mechanisms to communicate data and information to a variety of stakeholders.

MacCormack, K.E., Thorleifson, L.H., Berg, R.C. and Russell, H.A.J., ed. (2016): Three-Dimensional Geological Mapping: Workshop Extended Abstracts; Geological Society of America Annual Meeting, Baltimore, Maryland, October 31, 2015; Alberta Energy Regulator, AER/AGS Special Report 101, 99 p.