| Escucha Formation | |
|---|---|
| Stratigraphic range: Late Aptian-mid Albian ~ | |
View of Escucha and surrounding rocks | |
| Type | Geological formation |
| Sub-units | E1 to E3 |
| Underlies | Utrillas Formation |
| Overlies | Castrillo de la Reina, Benassal and Oliete Formations |
| Thickness | ~70 m (230 ft) |
| Lithology | |
| Primary | Siltstone, mudstone (E1, E3) sandstone (E2) |
| Other | Coal (E1) siltstone (E2), amber |
| Location | |
| Coordinates | 42°36′N 2°42′W / 42.6°N 2.7°W |
| Approximate paleocoordinates | 30°24′N 1°24′E / 30.4°N 1.4°E |
| Region | Teruel, Aragón La Rioja |
| Country | Spain |
| Extent | Cameros, Maestrazgo and Oliete Basins |
| Type section | |
| Named for | Escucha, Teruel |
The Escucha Formation is a geological formation in La Rioja and Teruel provinces of northeastern Spain whose strata date back to the late Aptian to middle Albian stages of the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.
The approximately 70 m (230 ft) thick formation underlies the Utrillas Formation and overlies Castrillo de la Reina, Benassal & Oliete Formations. The Escucha Formation comprises siltstones, mudstones, sandstones, coal, siltstones and amber, in which diverse fossil insects were found. The formation was deposited in a variety of continental to paralic (deltaic) environments.
The Escucha Formation represents syn-rift depositional environment, deposited in siliciclastic carbonate platforms, coastal siliciclastic environments and other offshore settings. In the basal part of the formation, cobble to boulder-sized dropstones of glacial origin have been identified, representing long-distance iceberg rafting from Arctic sources.
The Escucha Formation has provided the following fossils, among others:
| Dinosaurs of the Escucha Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Region | Member | Material | Notes | Image |
| Proa | P. valdearinnoensis | Santa Maria Mine | Lower Sedimentary Succession Member | Three partial skeletons and several skull elements from different individuals | Hadrosauriform ornithopod | |
| Europelta | E. carbonensis | Santa Maria Mine | Lower Sedimentary Succession Member | Two partial skeletons | Struthiosaurine ankylosaur | |
| Allosauroidea indet. | indeterminate | Santa Maria Mine | Lower Sedimentary Succession Member | Tooth | ||
| Titanosauriformes indet. | indeterminate | Partial unla | ||||
| Pseudosuchians of the Escucha Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Region | Member | Material | Notes | Image |
| Anteophthalmosuchus | A. escuchae | Santa Maria Mine | Lower Sedimentary Succession Member | Partial skeleton including skull, and other isolated remains | Goniopholididae. Partial skull AR-1-3422 represents juvenile individual of this taxon. | |
| Hulkepholis | H. plotos | Santa Maria Mine | Lower Sedimentary Succession Member | Partial skeleton including skull | Goniopholididae | |
| Testudines of the Escucha Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Region | Member | Material | Notes | Image |
| Aragochersis | A. lignitesta | Santa Maria Mine | Lower Sedimentary Succession Member | Two partial skeletons, both including complete skull | Helochelydridae turtle. | |
| Toremys | T. cassiopeia | Santa Maria Mine | Lower Sedimentary Succession Member | Multiple shells both articulated and disarticulated, and several appendicular elements | Pleurosternidae turtle. | |
| Trachydermochelys | T. sp. | Cabezo de las Eras | Lower Member | Helochelydridae turtle. | ||
| Fishes of the Escucha Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Region | Member | Material | Notes | Image |
| Chondrichthyes indet. | Indeterminate | Santa Maria Mine | Lower Sedimentary Succession Member | |||
| Osteichthyes indet. | Indeterminate | Santa Maria Mine | Lower Sedimentary Succession Member | |||
| Molluscs of the Escucha Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Region | Member | Material | Notes | Image |
| Bivalvia indet. | Indeterminate | Santa Maria Mine | Lower Sedimentary Succession Member | |||
| Gastropoda indet. | Indeterminate | Santa Maria Mine | Lower Sedimentary Succession Member | |||
| Crustaceans of the Escucha Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Region | Member | Material | Notes | Image |
| Cretagourretia | C. salasi | CV-13 Roadcut | Ctenochelidae decapod | |||
| Joeranina | J. tausi | CV-13 Roadcut | Palaeocorystidae decapod | |||
| Insects | ||||
|---|---|---|---|---|
| Taxa | Location/site | Notes | Images | |
| Alavaraphidia | Peñacerrada I amber | |||
| Amarantoraphidia | Peñacerrada I amber | |||
| Microcostaphron parvus | Peñacerrada I amber | |||
| Radiophron ibericus | Peñacerrada I amber | |||
| Styporaphidia? hispanica | Peñacerrada I amber | |||
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