The paper of McNamara et al. (2001) presents high-quality paleomagnetic data from the ca. 580–570 Ma volcanic and interbedded clastic rocks of the Marystown Group in the Avalon terrane of southern Newfoundland (western Avalonia) and is a welcome addition to the literature. We agree that their results indicate that the rocks of the Marystown Group were deposited at a paleolatitude of 34° +8°/–7°. However, we do not think that this paleolatitude necessarily implies proximity of western Avalonia to West Africa in the “latest Precambrian” as McNamara et al. suggest. Instead, we consider that the balance of the available evidence still...

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