Since 2005, the Utah Geological Survey has conducted annual excavations for several weeks at a time at a site known as Doelling's Bowl, located on lands managed by the US Bureau of Land Management in east-central Utah, United States.
The site is catalogued as UMNH VP.LOC.1208 at the Natural History Museum of Utah (UMNH), and as Utah Loc.
42Gr0300v at the Utah Geological Survey.
Its exact location is not publicly available.
Doelling's Bowl is known for a large bonebed, covering some 5,000 m² (54,000 sq ft) and measuring approximately 1 metre (3 ft 3 in) thick.
The rocks appear to be locally flat, but form broad swales over the whole site.
Out of this area, 140 m² (1,500 sq ft) has been excavated, producing 1500 vertebrate bones.
Rocks in the Doelling's Bowl bonebed mainly consist of green-grey sandy mudstone, but also contain silcrete, casts of silificied plant roots, and chert pebbles.
It belongs to the Cretaceous-aged Yellow Cat Member of the Cedar Mountain Formation.

In 2010, a skeleton of a subadult sauropod dinosaur was discovered in an arroyo within Gary's Island, a region at the western end of the bonebed named after its discoverer Gary Hunt.
Only part of the specimen - a partial left forelimb (scapula, sternal plates, ulna, radius, and hand), a complete left hindlimb, and ten caudal (tail) vertebrae - was articulated.
The feet of these limbs are buried in the sediment at a level deeper than the other remains, which suggests that the specimen died after being mired in soft mud.
Other remains are scattered over an area of 10 m² (110 sq ft), including a partial skull and lower jaw; three teeth; the atlas and eight other cervical vertebrae, along with eleven cervical ribs; eleven dorsal vertebrae, six dorsal ribs, and six sacral ribs; five other caudal vertebrae with two haemal arches; a right femur; and pelvic girdle elements, including an ilium, ischium, and two pubes.
Although the remaining elements have been displaced and eroded by the arroyo, the specimen is still the most complete Cretaceous sauropod from North America.
The specimen is catalogued as UMNH.VP.26004, but individual bones are catalogued with the prefix DBGI (Doelling's Bowl site).

Additional specimens - a lower jaw from a juvenile specimen, UMNH.VP.26010, and a juvenile femur, UMNH.VP.26011 - were also referred to the same taxon.
In 2017, all of these specimens were described by Rafael Royo-Torres, Paul Upchurch, James Kirkland, Donald DeBlieux, John Foster, Alberto Cobos, and Luis Alcalá as part of a research paper published in Scientific Reports.
They named a new genus for the specimens, Mierasaurus; the name honors Bernardo de Miera y Pacheco, a Spanish cartographer who was "the first European scientist to enter what is now Utah" in the Domínguez–Escalante expedition of 1776.
They also named the type and only species M. bobyoungi after Robert ("Bob") Young, in order to acknowledge "the importance of [his] underappreciated research" the geology of the Early Cretaceous of Utah.
Since 2005, the Utah Geological Survey has conducted annual excavations for several weeks at a time at a site known as Doelling's Bowl, located on lands managed by the US Bureau of Land Management in east-central Utah, United States. The site is catalogued as UMNH VP.LOC.1208 at the Natural History Museum of Utah (UMNH), and as Utah Loc. 42Gr0300v at the Utah Geological Survey. Its exact location is not publicly available. Doelling's Bowl is known for a large bonebed, covering some 5,000 m² (54,000 sq ft) and measuring approximately 1 metre (3 ft 3 in) thick. The rocks appear to be locally flat, but form broad swales over the whole site. Out of this area, 140 m² (1,500 sq ft) has been excavated, producing 1500 vertebrate bones. Rocks in the Doelling's Bowl bonebed mainly consist of green-grey sandy mudstone, but also contain silcrete, casts of silificied plant roots, and chert pebbles. It belongs to the Cretaceous-aged Yellow Cat Member of the Cedar Mountain Formation.
In 2010, a skeleton of a subadult sauropod dinosaur was discovered in an arroyo within Gary's Island, a region at the western end of the bonebed named after its discoverer Gary Hunt. Only part of the specimen - a partial left forelimb (scapula, sternal plates, ulna, radius, and hand), a complete left hindlimb, and ten caudal (tail) vertebrae - was articulated. The feet of these limbs are buried in the sediment at a level deeper than the other remains, which suggests that the specimen died after being mired in soft mud. Other remains are scattered over an area of 10 m² (110 sq ft), including a partial skull and lower jaw; three teeth; the atlas and eight other cervical vertebrae, along with eleven cervical ribs; eleven dorsal vertebrae, six dorsal ribs, and six sacral ribs; five other caudal vertebrae with two haemal arches; a right femur; and pelvic girdle elements, including an ilium, ischium, and two pubes. Although the remaining elements have been displaced and eroded by the arroyo, the specimen is still the most complete Cretaceous sauropod from North America. The specimen is catalogued as UMNH.VP.26004, but individual bones are catalogued with the prefix DBGI (Doelling's Bowl site).
Additional specimens - a lower jaw from a juvenile specimen, UMNH.VP.26010, and a juvenile femur, UMNH.VP.26011 - were also referred to the same taxon. In 2017, all of these specimens were described by Rafael Royo-Torres, Paul Upchurch, James Kirkland, Donald DeBlieux, John Foster, Alberto Cobos, and Luis Alcalá as part of a research paper published in Scientific Reports. They named a new genus for the specimens, Mierasaurus; the name honors Bernardo de Miera y Pacheco, a Spanish cartographer who was "the first European scientist to enter what is now Utah" in the Domínguez–Escalante expedition of 1776. They also named the type and only species M. bobyoungi after Robert ("Bob") Young, in order to acknowledge "the importance of [his] underappreciated research" the geology of the Early Cretaceous of Utah.
Mierasaurus