quarry was sold off. In 2006, the site was acquired by 3K Facilities. The company now offers deep borehole test facilities in one of the best-logged sites in the world. All the deep boreholes are now available to hire for a range of down hole testing. There are three deep boreholes (, , ), four uncased holes and one hole inclined at 30degrees, as well as micro seismic testing and a wind turbine test environment on this site. Although the energy has not yet been exploited commercially, the data provided by the tests has been widely used to test numerical simulation codes. The dataset contributed significantly to the geothermal power plant built with European Union sponsorship at Soultz-sous-Forêts. In March 2013, the quarry was put up for sale by the owners 3K Facilities. Borehole Seismic Test and Development Facility In February 2014 Rosemanowes Quarry was purchased by Avalon Sciences (a Somerset-based borehole seismic instrumentation company) with the intention to develop the site in to an industry leading facility for testing down hole seismic and logging instrumentation. The extensively characterised boreholes and wells within homogenous granite facilitates an ideal locality to prove down hole seismic receivers and sources, all extensively used within the oil and gas exploration and monitoring industries. This site will be available for use to both industry and academic institutions by the end of 2014/early 2015. Use by US forces during World War II During the Second World War, the Quarry was used for storage by US forces, preparing for the invasion of Europe, which started in June 1944. Location The quarry is at Herniss, to the north of the A 394 road, between Rame and Longdowns. Ordnance Survey, Explorer series, Map 103, : . See also Geothermal power in the United Kingdom Energy use and conservation in the United Kingdom Renewable energy References External links 3K Facilities company website The Cornubian Batholith of South West England Geography of Cornwall Geology of Cornwall Geothermal power stations in England Power stations in South West England Quarries in Cornwall