Question: Which prehistoric period of Mesopotamia were the majority of the remains from found in Tell al-Ubaid?

Context articles: The Croods
Tell al-`Ubaid
Arundel Cove Archaeological Site
Piute Pass Archeological District
Prehistoric Indonesia
Iowa archaeology
Triangulation Point Draw Site District
Ubaid period
Halaf-Ubaid Transitional period
Halaf culture

The Croods is a 2013 American 3D computer-animated comedy adventure film produced by DreamWorks Animation and distributed by 20th Century Fox.
 It stars the voices of Nicolas Cage, Emma Stone, Ryan Reynolds, Catherine Keener, Clark Duke, and Cloris Leachman.
 The film is set in a fictional prehistoric Pliocene era known as "The Croodaceous" (a prehistoric period which contains fictional prehistoric creatures) when a caveman's position as a "Leader of the Hunt" is threatened by the arrival of a prehistoric genius who comes up with revolutionary new inventions as they trek through a dangerous but exotic land in search of a new home.
Tell al-'Ubaid (Arabic: العبيد‎ ‎ ) is a low, relatively small tell (settlement mound) west of nearby Ur in southern Iraq's Dhi Qar Governorate.
 The majority of the remains are from the Ubaid period, for which Tell al-'Ubaid is the type site, with an Early Dynastic temple at the highest point.
Arundel Cove Archaeological Site is an archaeological site near Baltimore in Anne Arundel County, Maryland.
 It is situated on the south shore of Arundel Cove, a tributary of Curtis Creek which drains into the Patapsco River.
 The site was discovered during routine shovel test pitting of the U.S. Coast Guard Yard at Curtis Bay in 1981.
 The test pits revealed that the site is small in size, extending only 20 feet north-south by 15 feet east-west.
 It represents the remains of a prehistoric summer camp which apparently was not repeatedly occupied.
 It contains a prehistoric period storage pits, with evidence of the use of galium and wild black cherry.
The Piute Pass Archeological District is an archaeological district located along Piute Creek in eastern San Bernardino County, California.
 The district encompasses the area around the historic Fort Piute and includes a variety of prehistoric and historic resources.
 The Piute Pass area was inhabited by several Native American tribes dating back to the middle Holocene epoch.
 The Patayan people lived in the area during the late prehistoric period, while the Chemehuevi people lived there after the Patayan and through the early historic period.
 Both groups left petroglyphs in the area, and remains of Chemehuevi habitation sites have also been discovered.
 After European settlers came to the region, the pass became the site of Fort Piute, a U.S. Army redoubt which protected travelers along the Mojave Road.
Prehistoric Indonesia is a prehistoric period in the Indonesian archipelago that spanned from the Pleistocene period to about the 4th century CE when the Kutai people produced the earliest known stone inscriptions in Indonesia.
 Unlike the clear distinction between prehistoric and historical periods in Europe and the Middle East, the division is muddled in Indonesia.
 This is mostly because Indonesia's geographical conditions as a vast archipelago caused some parts — especially the interiors of distant islands — to be virtually isolated from the rest of the world.
 West Java and coastal Eastern Borneo, for example, began their historical periods in the early 4th century, but megalithic culture still flourished and script was unknown in the rest of Indonesia, including in Nias, Batak, and Toraja.
 The Papuans on the Indonesian part of New Guinea island lived virtually in the stone age until their first contacts with modern world in the early 20th century.
 Even today living megalithic traditions still can be found on the island of Sumba and Nias.
The archaeology of Iowa is the study of the buried remains of human culture within the state of Iowa from the earliest prehistoric through the late historic periods.
 When the American Indians first arrived in what is now Iowa more than 13,000 years ago, they were hunters and gatherers living in a Pleistocene glacial landscape.
 By the time European explorers visited Iowa, American Indians were largely settled farmers with complex economic, social, and political systems.
 This transformation happened gradually.
 During the Archaic period (10,500–2,800 years ago) American Indians adapted to local environments and ecosystems, slowly becoming more sedentary as populations increased.
 More than 3,000 years ago, during the Late Archaic period, American Indians in Iowa began utilizing domesticated plants.
 The subsequent Woodland period saw an increase on the reliance on agriculture and social complexity, with increased use of mounds, ceramics, and specialized subsistence.
 During the Late Prehistoric period (beginning about AD 900) increased use of maize and social changes led to social flourishing and nucleated settlements.
 The arrival of European trade goods and diseases in the Protohistoric period led to dramatic population shifts and economic and social upheaval, with the arrival of new tribes and early European explorers and traders.
 During the Historical period European traders and American Indians in Iowa gave way to American settlers and Iowa was transformed into an agricultural state.
The Triangulation Point Draw Site is an archeological site in Uinta County, Wyoming.
 The camp was occupied by Native Americans from both the Great Basin and the northwestern Plains during the Late Prehistoric period.
 Surface artifacts found at the site include chipped stone points and tools, ground stone tools, fire locations and organic stains.
 Buried artifacts include fire rings and habitation-related disturbances.
 Projectile points at the site include Plains side-notched, Rose Spring corner-notched and Late Prehistoric corner-notched points, as well as a Late Prehistoric small corner-notched point similar to those found in Mummy Cave, more than 200 mi to the north.
The Ubaid period (c. 6500 to 3800 BC) is a prehistoric period of Mesopotamia.
 The name derives from Tell al-`Ubaid where the earliest large excavation of Ubaid period material was conducted initially by Henry Hall and later by Leonard Woolley.
The Halaf-Ubaid Transitional period (ca. 5500/5400 to 5200/5000 BC) is a prehistoric period of Mesopotamia.
 It lies chronologically between the Halaf period and the Ubaid period.
 It is a very poorly understood period and was created to explain the gradual change from Halaf style pottery to Ubaid style pottery in North Mesopotamia.
The Halaf culture is a prehistoric period which lasted between about 6100 BCE and 5100 BCE.
 The period is a continuous development out of the earlier Pottery Neolithic and is located primarily in south-eastern Turkey, Syria, and northern Iraq, although Halaf-influenced material is found throughout Greater Mesopotamia.