01130nas a2200121   4500008004100000245010300041210006900144300000900213490000700222520072500229100001600954856003800970       2018                        eng d00aTropical Weathering of the Taconic Orogeny (i.e., “orogen”) as a Driver for Ordovician Cooling0 aTropical Weathering of the Taconic Orogeny ie orogen as a Driver  ae4360 v463 a<p>Swanson-Hysell and Macdonald (2017) follow Kump et al.’s (1999) proposal that decreasing temperatures through the Ordovician (e.g., Trotter et al., 2008) are largely explained by CO2 sequestration with weathering of silicates exposed by Taconic arc-Laurentia collision. They propose higher weatherability of the west-east‒trending Taconic orogen that they shift to a more equatorial, wet-tropical setting. The concerns that may be raised by a reader are whether the following are all responses to this orogeny: (1) the Ordovician temperature record, (2) the strontium and neodymium isotope record interpreted to reflect the Taconic orogeny (Swanson-Hysell and Macdonald, 2017), and (3) the interpreted pCO2.</p>
1 aLanding, E.  uhttps://doi.org/10.1130/G39987C.1