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From the shield to the sea
by
Features field guides and descriptions of eight geological field trips of the area near Pittsburgh, Pennsylvania. The trips highlight the region's geology from eastern Ohio to the Central Appalachian Valley and Ridge.
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Features field guides and descriptions of eight geological field trips of the area near Pittsburgh, Pennsylvania. The trips highlight the region's geology from eastern Ohio to the Central Appalachian Valley and Ridge.
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"Features field guides and descriptions of eight geological field trips of the area near Pittsburgh, Pennsylvania. The trips highlight the region's geology from eastern Ohio to the Central Appalachian Valley …"
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