Soil composition or association

Teagasc has analyzed the soil of Ireland and reported it on a website for anyone to access. This is what multiple samples in our region turned up:

Modern definition: Fine loamy drift with siliceous stones
Texture: Fine loamy
Substrate type: drift with siliceous stones
Substrate 1: drift
Substrate 2: siliceous stones


Here is how Drift with siliceous stones is defined in their technical report:

" Drift with siliceous stones encompasses all thick drift parent materials that do not qualify for the other drift types defined above. These deposits include drift dominated by sandstone, slate, shale or chert stones. Most soils in drift with siliceous stones are non-calcareous to at least 120 cm, but profiles with calcareous material above 120 cm may occur. Use of such a broadly defined category means that several soil series previously defined in drifts of different type or stratigraphical age in Ireland are now amalgamated (Jones et al., 2011). 45 Where calcareous shales are found, the soils thereon should be classified with soils on noncalcareous shales, unless the soil material above 40cm depth is moderately calcareous (> 2% CaCO3) where upon such soils should be classified in a calcareous subgroup of the appropriate Soil Group/Great Group. "
http://gis.teagasc.ie/soils/downloads/SIS_Final_Technical_Report_10.pdf

Siliceous stones are sedimentary rocks that have silica (SiO2) as the principal constituent. The most common siliceous rock is chert; other types include diatomite. They commonly form from silica-secreting organisms such as radiolarians, diatoms, or some types of sponges.

In Galicia, the soil contains granite stones. Granite is a light-colored igneous rock with grains large enough to be visible with the unaided eye. It forms from the slow crystallization of magma below the Earth's surface. Granite is composed mainly of quartz and feldspar with minor amounts of mica, amphiboles, and other minerals.

So the terroir is definitely going to be different. But is it the presence of stones that counts or what those stones are made of?  Again, we'll have to find out.