A Geologic Safari of the East African Rift

  • Slides: 14
Download presentation
A Geologic Safari of the East African Rift and the Newark Basin: Why these

A Geologic Safari of the East African Rift and the Newark Basin: Why these areas are more alike than you know Part 3: Focus on New Jersey Margaret H. Benoit The College of New Jersey 1

“proto” New Jersey USGS http: //pubs. usgs. gov/gip/dynamic. html 2

“proto” New Jersey USGS http: //pubs. usgs. gov/gip/dynamic. html 2

Currently, seafloor spreading is occurring at the Mid-Atlantic Ridge, USGS http: //pubs. usgs. gov/gip/dynamic.

Currently, seafloor spreading is occurring at the Mid-Atlantic Ridge, USGS http: //pubs. usgs. gov/gip/dynamic. html Before spreading initiated, central New Jersey was the location of a continental rift 3

Rift basin locations along East Coast associated with the Breakup of Pangaea Modified from

Rift basin locations along East Coast associated with the Breakup of Pangaea Modified from Withjack et al. , 1988 by Roy W. Schlische, Rutgers University http: //geology. rutgers. edu/103 web/Newarkbasin/ENArifts. jpg 4

New Jersey Geology Shale and other lacustrine Sedimentary rocks Intrusive and extrusive basaltic composition

New Jersey Geology Shale and other lacustrine Sedimentary rocks Intrusive and extrusive basaltic composition igneous rocks Modified from NJ Geological Survey (1994) by Roy W. Schlische, Rutgers University, http: //geology. rutgers. edu/103 web/Newarkbasin/NJgeol_N 1. html 5

Major fault locations in New Jersey Modified from NJ Geological Survey (1994) by Roy

Major fault locations in New Jersey Modified from NJ Geological Survey (1994) by Roy W. Schlische, Rutgers University, http: //geology. rutgers. edu/103 web/Newarkbasin/NJgeol_N. html 6

Fault cross sections in the Basin ‘Cool’ colors represent Sedimentary shales, Mudstones, and sandstones

Fault cross sections in the Basin ‘Cool’ colors represent Sedimentary shales, Mudstones, and sandstones ‘Pink’ color represents intrusive igneous dikes and sills Modified from Schlische (1992) and Olsen et al. (1996) 7

Cross sections of major faults ‘Cool’ colors represent Sedimentary shales, mudstones, and sandstones ‘Pink’

Cross sections of major faults ‘Cool’ colors represent Sedimentary shales, mudstones, and sandstones ‘Pink’ color represents intrusive igneous dikes and sills Schlische (1992) http: //geology. rutgers. edu/103 web/Newarkbasin/NB_xsects. html 8

Idealized Half-Graben Modified from Schlische (1994) http: //geology. rutgers. edu/103 web/Newarkbasin/halfgraben. html 9

Idealized Half-Graben Modified from Schlische (1994) http: //geology. rutgers. edu/103 web/Newarkbasin/halfgraben. html 9

Idealized Sediment deposition during rifting Roy W. Schlische, Rutgers Univesity http: //geology. rutgers. edu/103

Idealized Sediment deposition during rifting Roy W. Schlische, Rutgers Univesity http: //geology. rutgers. edu/103 web/Newarkbasin/synsed. html 10

Shale layers in Newark Basin Photo by Bryan Molinaro, The College of New Jersey

Shale layers in Newark Basin Photo by Bryan Molinaro, The College of New Jersey http: //www. bryanmolinaro. com/photos/structual/images/P 1040785_JPG. jpg 11

Igneous contact zone in Flemington, NJ shale hornfels (baked shale from contact metamorphism) basalt

Igneous contact zone in Flemington, NJ shale hornfels (baked shale from contact metamorphism) basalt Photo by Bryan Molinaro, The College of New Jersey http: //www. bryanmolinaro. com/photos/structual/images/P 1040800_JPG. jpg 12

Igneous Rocks from Newark Basin in Piedmont region Highly jointed Orange Mountain basalts at

Igneous Rocks from Newark Basin in Piedmont region Highly jointed Orange Mountain basalts at Flemington, NJ Photos by Bryan Molinaro, The College of New Jersey http: //www. bryanmolinaro. com/photos/structual/images/P 1040804_JPG. jpg http: //www. bryanmolinaro. com/photos/structual/images/P 1040806_JPG. jpg 13

Watchung mountains Formed from basaltic Fissure eruptions during Other topographic highs In Piedmont region

Watchung mountains Formed from basaltic Fissure eruptions during Other topographic highs In Piedmont region also Formed from intrusive Diabase sills and dikes NGDC http: //www. ngdc. noaa. gov/cgi-bin/mgg/ topo/state 2. pl? region=nj. jpg 14

A Geologic Safari of the East African RiftA Geologic Safari of the East African Rift
MARELE RIFT AFRICAN Zonele de rift sunt unitatiMARELE RIFT AFRICAN Zonele de rift sunt unitati
Earth History Geologic Time Geologic Time Geologic TimeEarth History Geologic Time Geologic Time Geologic Time
Earth History Geologic Time Geologic Time Geologic TimeEarth History Geologic Time Geologic Time Geologic Time
The Geologic Time Scale Geologic Time Scale GeologicThe Geologic Time Scale Geologic Time Scale Geologic
Earth History Geologic Time Geologic Time Geologic TimeEarth History Geologic Time Geologic Time Geologic Time
Geologic Time Geologic Time Introduction The Geologic TimeGeologic Time Geologic Time Introduction The Geologic Time
GEOLOGIC MAPS Geologic Maps Shows geologic features rocksGEOLOGIC MAPS Geologic Maps Shows geologic features rocks
East African Rift Rwenzori Whats TorresAcosta et alEast African Rift Rwenzori Whats TorresAcosta et al
On Safari and Dialogue 1 On Safari JamboOn Safari and Dialogue 1 On Safari Jambo
KENYA SAFARI VACATION PACKAGES Plan Kenya safari 5KENYA SAFARI VACATION PACKAGES Plan Kenya safari 5
Safari park Lets go to safari park ToSafari park Lets go to safari park To
EAST AFRICAN COMMUNITY 2 ND EAST AFRICAN CIVILEAST AFRICAN COMMUNITY 2 ND EAST AFRICAN CIVIL