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Question 1
Compared with Tortonian marls, how would you describe the Helvetian (Serravallian) soils of the Langhe?
A
Younger, sandier, and more weathered, with higher sand content and lower clay density
B
Older, denser, and richer in clay and calcium carbonate
C
Volcanic and porphyritic, with a firm mineral spine
D
Deep, water-retaining loam that forces roots to stay shallow
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