EntityQ848370· pop 6· linked from 115 articlesfall lineSign in to savegeomorphologic break that demarcates the border between an upland region and a coastal plainConnectionsSt. Lawrence RiverEntityUnited StatesCountryInternational Standard Book NumberEntitywaterfallEntityQuebec CityEntityRichmondEntityCretaceousEntitysedimentary rockEntityfaultEntitywatermillEntitysedimentEntitylockEntityrapidsEntityTertiaryEntityUnited States Geological SurveyEntityOttawa RiverEntitysawmillEntityshoalEntityU-shaped valleyEntitygristmillEntityCategoriesGeomorphology