The phrase 'extensive fieldwork experience' is correct and can be used in written English.
You can use it when you want to emphasize a significant amount of experience a person has in a particular field of research. For example: "The researcher was able to draw on her extensive fieldwork experience to develop her groundbreaking theories."
From his extensive fieldwork and research experience, Dani refuted any influence of South Indian culture on the Indus Valley Civilization.
The Carter Center has also done extensive fieldwork.
Modern scientific study of the mountains was initiated with the work of the Norwegian explorer and ethnologist Carl Lumholtz, who in 1890 98 did extensive fieldwork throughout the Sierra Madre Occidental.
He gained fieldwork experience working for the British Geological Survey.
He brought it to the Paleontology Museum of Bariloche, which contacted Luis Chiappe of the Natural History Museum of Los Angeles County, who has done extensive fieldwork in Patagonia.
These studies are based on extensive fieldwork conducted on 36 exposures and 13 drillings in floodplain positions.
Most of the studies on fieldwork learning focus on strategies during the fieldtrip, whereas only a few focus on the preparation, and yet this stage is crucial for students to get maximum benefit from the fieldwork experience.
Extensive fieldwork was done along several transverse cuttings across the imbricated, high and low folded thrust zones, including ten outcrops of stratigraphic section and six wells (Fig. 1).
To meet this objective, this article draws on a case study design based on primary and long-term evidence gathered through extensive fieldwork in Brazil.
Extensive fieldwork has been completed to identify potential source regions of Chacoan corncobs, but the San Juan Basin and surrounding regions are vast and many potential agricultural features remain uninvestigated.
