There was a whole discussion on this subject on the multritran forum. You can check it out here: http://89.108.112.68/c/m.exe?a=4&&MessNum=214558&l1=1&l2=2

An example of this usage in context: "We have provided EOD technical consultants on a variety of exploration and seismic contracts. Their work has included enhanced surveys, identification and marking of UXO, offering technical advice and conducting mine awareness briefings."
From MineTech International: http://www.minetech.co.uk/workhistory/northern-iraq.html

"Identification and marking of" in the context of mining comes up many, many times in Google.

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Note added at 1 hr (2011-12-29 12:57:05 GMT)
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Another example:
"In 2005, Lincoln conducted aerial photography over the entire district and produced a high-quality topographic base map. The base map was used for a soil sample survey and detailed geologic mapping over the southern portion of the district vein system. Numerous targets were IDENTIFIED AND MARKED for drill testing."
From Lincoln Mining Corp: http://www.lincolnmining.com/projects/la_bufa/summary/