Talk:Sierra Madre Oriental

Sierra Madre Oriental pine-oak forests

The merging of the article on the Sierra Madre Oriental pine-oak forests ecoregion into this one has caused the ecology section to contradict itself. It begins by describing the diversity of ecoregions found in the mountain range, but then states that montane vegetation (1000-3000 m) is dominated by pines and oaks. The problem with that statement is that portions of the Tamaulipan matorral and Veracruz moist forests also fall within the same elevation range but are not dominated by pines or oaks. The best solution would be to maintain a separate article on the Sierra Madre Oriental pine-oak forests and outline the various plant communities found in the mountain range in this article's flora section.--TDogg310 (talk) 18:05, 22 August 2010 (UTC)

I was surprised somebody thought they could do that merging. It negates the reason why ecozones, ecotypes, floristic provinces, regions, areas, even exist. There are (almost always), outer, outlying regional areas displaced by distance, (altitude, or temperature).. see refugium (population biology). ...Mmcannis (talk) 20:34, 22 August 2010 (UTC)

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American continuation

There is an uncited statement in the beginning of the article indicating that the Davis and Guadalupe mountains are continuations in the US of the Sierra. I've not read anything to indicate they are related, and that includes their respective WP articles.

It would be reasonable to say the Sierra del Caballo Muerto are a continuation of the Sierra del Carmen, which would make them part of the Sierra Madre Oriental. Angiest (talk) 02:25, 15 July 2024 (UTC)

Geologically, the Davis Mountains, Guadalupe Mountains, Sierra del Caballo Muerto, and the Sierra del Carmen, are in no way part of the Sierra Madre Oriental what so ever. Ecologically, there are some peripheral and marginal associations but, I always thought it was a bit of a stretch to include the Davis and Guadalupe Mountains as part of the Sierra Madre Oriental. WiLaFa (talk) 02:35, 16 July 2024 (UTC)

@Wilafa I'd have to go hunting, but I have read that the Sierra del Caballo Muerto are an extension if the del Carmen. It makes sense, as only the river separates them. Angiest (talk) 17:15, 16 July 2024 (UTC)

Geologically speaking, nothing in the greater Big Bend region, north or south of the Rio Grande is part of the Sierra Madre Oriental. The folding and faulting that formed the Sierra Madre Oriental occurred in the Early Tertiary exposing sedimentary marine rocks largely of Cretaceous and Jurassic origin, with sedimentary clastic Cenozoic rock and recent alluvial deposits in the valleys and basins. Isolated exposures of Precambrian, Paleozoic, and Mesozoic-Triassic rock occur locally. The mountains in Texas and northern Coahuila, Mexico were not formed in the same processes that formed the Sierra Madre Oriental. The Sierra Madre Oriental stops in the Monterrey, Nuevo Leon area, with a western extension ending near Torreón.

Any clams or association between the Sierra Madre Oriental and any mountains north of Monterrey are strictly limited to an ecological level, not geological. That is, they share some flora and fauna (but by no means all). As I stated above, including anything in the USA or the Sierra del Carmen in northern Coahuila in the Sierra Madre Oriental is a bit of a stretch in my opinion. Although I know it is sometimes said. WiLaFa (talk) 07:29, 18 July 2024 (UTC)

@Angiest: Just to be clear, I have read and heard people suggesting and arguing the concept that the Sierra Madre Oriental extends into the mountains north of Monterrey and into the Trans-Pecos region of Texas. The idea has been out there for decades, and I am not arguing to exclude it from this article. However, it should be made explicitly clear in the article that the Sierra Madre Oriental and the mountains north of Monterrey are entirely different geological formations. And also reflect that the inclusion of the northern ranges extending into border areas and the US as part of the Sierra Madre Oriental, is limited to ecological considerations (flora, fauna, habitat), and an interpretation not universally accepted by all.WiLaFa (talk) 02:27, 19 July 2024 (UTC)