Figure 2 | Scientific Reports

Figure 2

From: Rifting of the oceanic Azores Plateau with episodic volcanic activity

Figure 2

The variation of (a) Nb/Zr and (b) 176Hf/177Hf ratios versus water depth [meters below sea level. mbsl] of the samples recovered at the northern graben shoulder of the Hirondelle Basin. Samples of the lower unit are depicted as black symbols and of the upper unit in red. Note that the error bars in (b) are smaller than the symbols and therefore not shown in this graph. The bold numbers indicate the Ar–Ar groundmass plateau ages of selected samples.

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