Abstract
Prior to the development of the modern Amazonian drainage network during the Late Miocene-Early Pliocene,
large areas of western Amazonia may have been occupied by an extensive lacustrine and wetland environment
known as the Pebas and Acre systems. These depositional systems are thought to have formed in response to
foreland subsidence east of the uplifting Andes. Based on the occurrence at a present-day elevation of 1600m of
fossil pearly freshwater mussels of the genus Anodontites (indet. species) in intermontane Chota Basin of northern
Ecuador (the westernmost South American fossil record for this genus), we discuss their potential implications
for understanding of westernmost limit of the Miocene wetland ecosystem and consequently a later timing for
the regional uplift of the Eastern Cordillera.
large areas of western Amazonia may have been occupied by an extensive lacustrine and wetland environment
known as the Pebas and Acre systems. These depositional systems are thought to have formed in response to
foreland subsidence east of the uplifting Andes. Based on the occurrence at a present-day elevation of 1600m of
fossil pearly freshwater mussels of the genus Anodontites (indet. species) in intermontane Chota Basin of northern
Ecuador (the westernmost South American fossil record for this genus), we discuss their potential implications
for understanding of westernmost limit of the Miocene wetland ecosystem and consequently a later timing for
the regional uplift of the Eastern Cordillera.
| Translated title of the contribution | Moluscos de agua dulce del Mioceno tardío de la cuenca intermontana del Chota, norte de los Andes Ecuatorianos |
|---|---|
| Original language | English |
| Pages (from-to) | 39 |
| Number of pages | 46 |
| Journal | Journal of South American Earth Sciences |
| Volume | 89 |
| DOIs | |
| State | Published - Jan 2019 |
