378 N. H. DARTON — CATALOG OF PHOTOGRAPHS 



Page 



Utah 434 



Vermont 434 



Virginia and West Virginia 435 



Washington 437 



Wyoming 441 



Yellowstone Park views 442 



Miscellaneous photographs 445 



Subject catalogue '. 448 



Ant hill 448 



Bad lands 448 



Beach deposits .' 449 



Canyons 449 



Castellated erosion forms 451 



Cave interiors 452 



Chert and flint 552 



Columnar structure 452 



Conglomerates 452 



Concretions 452 



Contacts of igneous rock 453 



Creep striae 453 



Cross-bedding 453 



Crystals in rocks 453 



Deltas 453 



Dikes, igneous 454 



Dikes, sandstone 454 



Dismal swamp 454 



Earthquake phenomena 454 



Experiments in folding loaded strata in horizontal thrust 454 



Faults 454 



Fissures 455 



Flexures (including creep) 455 



Fossils 456 



Geysers, Yellowstone park, Wyoming 457 



Glaciers 457 



Glacial deposits 458 



Glacial lakes. 400 



Glacial scratches, furrows, etcetera 460 



Glacial topography 460 



Great plains 462 



Inclusions in igneous rock 462 



Interformational conglomerates and unconformities 462 



Lacnolite dome 462 



Lake terraces (old) 463 



Landslides 463 



Maps of geological development of the United States 463 



Mesas 463 



Mineral deposits 463 



Mining operations 464 



Monoclinal ridges 465 



Mud cracks 465 



Natural bridges : 465 



