and the Côte-d'Or has many areas composed of limestone and clay. In Burgundy, the amount of limestone to which the Chardonnay vines are exposed also seems to have some effect on the resulting wine. In the Meursault region, the premier cru vineyards planted at Meursault-Charmes have topsoil almost above limestone and the resulting wines are very rich and rounded. In the nearby Les Perrières vineyard, the topsoil is only around above the limestone and the wine from that region is much more powerful, minerally, and tight, needing longer in the bottle to develop fully. In other areas, soil type can compensate for lack of ideal climate conditions. In South Africa, for example, regions with stonier, shaley soils and high clay levels tend to produce lower-yielding and more Burgundian-style wine, despite having a discernibly warmer climate than France. In contrast, South African Chardonnay produced from more sandstone-based vineyards tend to be richer and more weighty. Confusion with Pinot blanc Due to some ampelographical similarities, Pinot blanc and Chardonnay were often mistaken for each other and even today share many of the same synonyms. The grape vines, leaves, and clusters look identical at first glance, but some subtle differences are seen. The most visible of these can be observed as the grapes are ripening, with Chardonnay grapes taking on a more golden-green color than Pinot blanc grapes. On closer inspection, the grapevine shows slight differences in the texture and length of the hairs on the vine's shoot, and the veins of a Chardonnay leaf are "naked" near the petiolar sinus – the open area where the leaf connects to the stem is delineated by veins at the edge. Cabernet Sauvignon is one of the few other Vitis vinifera grape vines to share this characteristic. This confusion between Pinot blanc and Chardonnay was very pervasive throughout northern Italy, where the two vines grew interspersed in the vineyard and were blended in winemaking. The Italian government did not dispatch researchers to try to distinguish the two vines until 1978. A similar situation occurred in France, with the two vines being commonly confused until the mid-19th century, when ampelographers began combing through the vineyards of Chablis and Burgundy, identifying the true Chardonnay and weeding out the Pinot blanc. France In France, Chardonnay is the second-most widely planted white grape variety just behind Ugni blanc and ahead of Sémillon and Sauvignon blanc. The grape first rose