|Latitude & Longitude (WGS84):||40° 48' 4'' North , 74° 14' 35'' West|
|Latitude & Longitude (decimal):||40.80111,-74.24306|
|Köppen climate type:||Cfa : Humid subtropical climate|
A trap rock quarry in the Orange Mountain (First Watchung) Basalt, adjacent to Eagle Rock Avenue. Exposed the lower part of the OM basalt and the uppermost beds of the Passaic formation.
4 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
174.1 - 201.3 Ma
|Orange Mountain Basalt|
Age: Early Jurassic (174.1 - 201.3 Ma)
Stratigraphic Name: Orange Mountain Basalt
Description: (Olsen, 1980) - Dark-greenish-gray to greenish-black basalt composed mostly of calcic plagioclase (typically An65) and clinopyroxene (augite and pigeonite); crystals are generally less than 1 mm (0.04 in) long. Consists of three major flows. The flows are separated in places by a weathered zone or by a thin, up to 3-m- (10-ft-) thick bed of red siltstone (not shown on map) or volcaniclastic rock. Lowest flow is generally massive and has widely spaced curvilinear joints; columnar joints in lowest flow become more common toward the northeast. Middle flow is massive or has columnar jointing. Lower part of the uppermost flow has pillow structures; upper part has pahoehoe flow structures. Tops and bottoms of flow layers are vesicular. Maximum thickness is about 182 m (597 ft).
Comments: Newark Supergroup, Brunswick Group (Lyttle and Epstein, 1987).
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. 
201.3 - 252.17 Ma
|Mesozoic intrusive rocks|
Age: Triassic (201.3 - 252.17 Ma)
Comments: Newark Graben System; Newark-Delaware Basin
Lithology: Intrusive igneous rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529.