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Access to the Table of Contents and Abstracts is freely available. Members can use their GSA username and password to access their subscriptions (including their free Geology subscription) at To log in, click on the “GSA Member Sign In” link near the top of the screen. Members can also sign in by clicking on the “Sign-In” link in the top right of the screen, then choosing the “GSA Member Sign In” link next to the GSA logo.

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