| Title | The tectonic evolution of Laurentia and the North American continent: new datasets, insights, and models |
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| Author | Whitmeyer, S J; Kellett, D A ; Tikoff, B; Williams, M L |
| Source | Laurentia: turning points in the evolution of a continent; Geological Society of America, Memoir vol. 220, 2023 p. 7-16, https://doi.org/10.1130/2022.1220(001) |
| Image |  |
| Year | 2023 |
| Alt Series | Natural Resources Canada, Contribution Series 20210545 |
| Publisher | Geological Society of America |
| Document | serial |
| Lang. | English |
| Map Info. | location, 1:44,000,000 |
| Media | paper; digital; on-line |
| File format | pdf; html |
| NTS | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Area | North America |
| Lat/Long WENS | -141.0000 -50.0000 90.0000 41.7500 |
| Lat/Long WENS | 0.0000 0.0000 -2000.0000 -2000.0000 |
| Subjects | Science and Technology; tectonics; Nature and Environment; rivers; lakes; physiography; Laurentia; Boundaries |
| Illustrations | graphs |
| Program | GEM2: Geo-mapping for Energy and Minerals GEM Synthesis |
| Released | 2023 01 09 |
| Abstract | The North American continent has a rich geologic record that preserves evidence for tectonic processes throughout much of Earth's history. Within this long history, however, particular times-e.g.,
"turning points"—have had specific and lasting impact on the evolution of Laurentia (ancestral North America). This volume is focused on seven of these "turning points": (1) The Neoarchean (2.7-2.5 Ga), characterized by cratonization and the Kenoran
orogen(s); (2) the Paleoproterozoic (1.9-1.7 Ga) and the initial assembly of Laurentia; (3) the Mesoproterozoic (1.5-1.4 Ga) Andean-style margin on the southern edge of Laurentia with the Pinware-Baraboo-Picuris orogeny; (4) the 1.2-1.0 Ga
Midcontinent rift, and the Grenville orogeny and assembly of Rodinia; (5) the 700-500 Ma Neoproterozoic breakup of Rodinia; (6) the mid-Paleozoic (420-340 Ma) closure of the Iapetus and Rheic oceans and the development of the Appalachian-Caledonian
orogen; and (7) the Jurassic-Paleogene (200-50 Ma) assembly of the North American Cordilleran margin by terrane accretion and subduction. The assembled chapters provide syntheses of current understanding of the geologic evolution of Laurentia and
North America, as well as new hypotheses for testing. The inclusion of work from different geological time periods within a single volume provides continent-wide perspectives on the evolution of tectonic events and processes that acted on and within
Laurentia. |
| Summary | (Plain Language Summary, not published)
This is the introductory chapter to a Geological Society of America Memoir on the geological evolution of Laurentia. Chapter contributions are based upon
a Pardee symposium and seven related special sessions held at the virtual 2020 Geological Society of America annual meeting. Contributions cover new data, insights and models for seven critical time periods in Laurentia's geological
history. |
| GEOSCAN ID | 329439 |
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