Keith D. Putirka Books

Geologic excursions from Fresno California and the Central Valley
Geologic excursions from Fresno California and the Central Valley

By Keith D. Putirka

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"This volume presents field guides that span the breadth of central California's geology. The trips are associated with the 2013 GSA Cordilleran Section meeting, convened in Fresno, California, 18-...

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Formation of the Sierra Nevada batholith
Formation of the Sierra Nevada batholith

By Scott R. Paterson, Keith D. Putirka, Vali Memeti

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"This comprehensive field guide takes you on a six-day, west-to-east geologic journey across the Mesozoic magmatic arc of the central Sierra Nevada in California. It summarizes field, structural, g...

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What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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