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"In railway engineering, the running together of parallel tracks into the space occupied by one, by crossing the two inner rails so as to bring each side by side with the opposite outer rail." -Whitney, 1911

Gauntlet Track

"In railway engineering, the running together of parallel tracks into the space occupied by one, by…

Natural and columnar section to illustrate compound offlapping and overlapping series.

Compound Offlapping and Overlapping Series

Natural and columnar section to illustrate compound offlapping and overlapping series.

Section to illustrate the relationships of strata formed by a compound, transgressing, retreatal and transgressive movement of the sea with the resulting overlapping, offlapping and overlapping series separated by a compound sandstone of emergence and submergence.

Offlaps Followed by Overlap

Section to illustrate the relationships of strata formed by a compound, transgressing, retreatal and…

Diagrammatic section to illustrate the overlap of continental beds over a retreatal marine series.

Overlap of Continental Beds

Diagrammatic section to illustrate the overlap of continental beds over a retreatal marine series.

East-west section across the state of New York, showing the various types of overlap characteristic of the formations. The depression in Utica is due to erosion.

Various Types of Overlap Across New York State

East-west section across the state of New York, showing the various types of overlap characteristic…