The orientation of a cross section must be chosen to balance the need for a clear representation of the features of interest with the availability of appropriate information. In development geology, this information comes largely from well data (geophysical logs, mudlogs, and cores), but in some places, [http://www.merriam-webster.com/dictionary/outcrop outcrops] and [[Seismic data|seismic reflection data]] can be used to constrain interpretations. | The orientation of a cross section must be chosen to balance the need for a clear representation of the features of interest with the availability of appropriate information. In development geology, this information comes largely from well data (geophysical logs, mudlogs, and cores), but in some places, [http://www.merriam-webster.com/dictionary/outcrop outcrops] and [[Seismic data|seismic reflection data]] can be used to constrain interpretations. |