41. This calcareous soil strata within Potomac Creek is referred to as the Aquia Formation, which is 60 million years old. 42. Conversely, in calcareous soils , moorlands and meadows shrubs such as the mountain avens ( Dryas octopetala ) are more abundant. 43. In the north, H�leb�cken ( A tributary of B�ve�n ) has cut through the calcareous soil , creating a system of ravines. 44. Chablis winemakers want to emphasise the " terroir " of the calcareous soil and cooler climate that help maintain high acidity. 45. They are found to inhabit areas that have loamy, clay, gravelly, sandy or calcareous soils where they are able to burrow. 46. Wilga prefers calcareous soils -either red clays or sandy soils, and grows as scattered trees in open woodland or occasionally in stands. 47. Basic or calcareous soil environments are uncommon to rare on the Virginia coastal plain and can support vegetation unusual for the region. 48. Barbera can adapt to a wide range of vineyard soils but tends to thrive most in less fertile calcareous soils and clay loam. 49. Its average annual rainfall is about 1, 300 mm and its calcareous soils are suitable for cultivation of a wide variety of crops. 50. In some parts of its range, this tree may be used as an indicator of the presence of limestone or of calcareous soils .
