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The Triassic Lockatong Formation is a mapped bedrock unit in Pennsylvania, New Jersey, and New York. It is named after the Lockatong Creek in Hunterdon County, New Jersey. Lockatong Formation Type Geological formation Lithology Location Contents 1 Description 1.1 Depositional Environment 1.2 Fossils 2 Age 3 Economic Uses 4 References 5 See also Description The Lockatong is defined as a light to dark gray, greenish-gray, and black very fine grained sandstone, silty argillite, and laminated mudstone. In New Jersey, the cyclic nature of the formation is noted with hornfels near diabase and basalt flows.[1] Depositional Environment The Lockatong is often described as lake or litoral sediments. The interfingering nature of the sediments with the surrounding Stockton Formation and Passaic Formation suggests that these litoral environments shifted as climate or as the dynamic terrane of the area developed.[2] The deposition of calcitc sedimentsis indicative of a climate with high evaporation rates.[2] Fossils This section is empty. You can help by adding to it. Age Relative age dating of the Lockatong places it in the Upper Triassic period, being deposited between 237 to 207 (±5) million years ago. It rests unconformably below many different formations of the Atlantic Coastal Plain. It interfingers with both the Stockton Formation and Passaic Formation. There are numerous diabase intrusions and basalt into the Stockton with local contact metamorphic rocks.[3] Economic Uses This section is empty. You can help by adding to it. References ^ Orndorff, R.C., et al., (1998). Bedrock Geologic Map of Central and Southern New Jersey. United States Geologic Survey, Scale 1:100,000. ^ a b Faill, R.T., (2004). The Birdsboro Basin. Pennsylvania Geology V. 34 n. 4. ^ Berg, T.M., et al., (1983). Stratigraphic Correlation Chart of Pennsylvania: G75, Pennsylvania Geologic Survey, Harrisburg, Pennsylvania. See also Geology of Pennsylvania Geology of New Jersey v · d · eGeology of the Newark Basin Geologic Formations Newark Supergroup Jurassic Orange Mountain Basalt  • Feltville Formation  • Preakness Basalt  • Towaco Formation  • Hook Mountain Basalt  • Boonton Formation Triassic Stockton Formation  • Lockatong Formation  • Passaic Formation Traprock Ridges Basalt Watchung Mountains Campgaw Mountain  • Preakness Range  • Goffle Hill  • Newark Mountains Watchung Outliers Ladentown  • Union Hill  • New Germantown/Oldwick  • Prospect Hill  • Sand Brook  • Jacksonwald Diabase Palisades Sill Hudson River Palisades  • High Tor  • Hook Mountain  • Clausland Mountan  • Tallman Mountain  • Snake Hill Other Intrusions Cushetunk Mountain  • Sourland Mountain  • Rocky Hill Ridge  • Mount Gilboa  • Bowman’s Hill  • Solebury Mountain  • Buckingham Mountain  • Jericho Mountain  • Haycock Mountain  • Millers Point Faults Ramapo Fault Hopewell Fault  • Flemington Fault  • Chalfont Fault Eastern North America Rift Basins This article about a specific stratigraphic formation is a stub. You can help Wikipedia by expanding it.v · d · e