Question: Which meridian extends across Europe, the Mediterranean Sea, Africa, Asia, the Pacific Ocean, North America, and the Atlantic Ocean?

Context paragraphs:
Permanent Maghreb: The Permanent Maghreb of World Wide Fund for Nature is a freshwater ecoregion of North Africa.  The Permanent Maghreb ecoregion covers an area of 950,180 square kilometers, and extends across the portions of Algeria, Mauritania, Morocco, Tunisia, and Western Sahara.  It occupies the Mediterranean Climate region of northern Africa, and is characterized by rivers and streams ,which flow on the surface year-round.  The ecoregion is bounded on the north by the Atlantic Ocean and Mediterranean Sea, and to the south, by the Temporary Maghreb freshwater ecoregion, which covers the northern portion of the Sahara and is characterized by temporary or seasonally-flowing rivers and streams.  The major habitat types of the ecoregion are the Mediterranean systems and the Temperate coastal rivers.

37th parallel north: The 37th parallel north is a circle of latitude that is 37 degrees north of the Earth's equatorial plane.  It crosses Europe, the Mediterranean Sea, Africa, Asia, the Pacific Ocean, North America, and the Atlantic Ocean.

79th meridian west: The meridian 79° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, the Caribbean Sea, Central America, South America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.

Threatened mammals of Europe: The list below contains threatened mammals that dwell in or migrate to any region in Europe, the East Atlantic Ocean, and any nearby islands of the Atlantic Ocean.  This includes mammals that are found in the East Atlantic Ocean (Azores), Iceland, the Adriatic Sea, the Sea of Azov, the Black and Caspian Sea, Corsica, Cyprus, Palearctic, Russia, Eurasia, North African Coast, the Mediterranean Sea and islands located in the Mediterranean Sea, and the islands of Spain (Canary, Balearic).  The list below was compiled from data on the IUCN Red List of Endangered Species (IUCN).  The International Union for Conservation of Nature identifies species in need of attention before approaching extinction and works to increase prevention of extinction.  The list below includes vulnerable (VU), endangered (EN), critically endangered (CR), and recently extinct (EX) species.

Parting of the Waters: Parting of the Waters is an unusual hydrologic site at Two Ocean Pass on the Great Divide, within the Teton Wilderness area of Wyoming's Bridger-Teton National Forest.  Two Ocean Pass separates the headwaters of Pacific Creek, which flows west to the Pacific Ocean, and Atlantic Creek, which flows east to the Atlantic Ocean.  At Parting of the Waters, at , North Two Ocean Creek flows down from its drainage on the side of Two Ocean Plateau and divides its waters more-or-less equally between its two distributaries, Pacific Creek and Atlantic Creek.  From this split, Two Ocean Creek waters flow either 3488 mi to the Atlantic Ocean via Atlantic Creek and the Yellowstone, Missouri and Mississippi Rivers, or 1353 mi to the Pacific Ocean via Pacific Creek and the Snake and Columbia Rivers.  In the marshy area of Two Ocean Pass adjacent to Parting of the Waters, water actually covers the Continental Divide such that a fish could swim from the Pacific Ocean to the Atlantic Ocean drainages.  In fact, it is thought that this was the pass that provided the route for Yellowstone cutthroat trout to migrate from the Snake River (Pacific) to Yellowstone River (Atlantic) drainages.

80th meridian west: The meridian 80° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, the Caribbean Sea, Central America, South America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.

Cimarron meridian: The Cimarron meridian, in longitude 103° west from Greenwich, extends from latitude 36° 30′ to 37° north, and, with the base line in latitude 36° 30′ north, governs the surveys in Oklahoma west of 100° west longitude from Greenwich.

78th meridian west: The meridian 78° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, the Caribbean Sea, Central America, South America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.

Eurasia: Eurasia is a combined continental landmass of Europe and Asia.  The term is a portmanteau of its constituent continents (Europe & Asia).  Located primarily in the Northern and Eastern Hemispheres, it is bordered by the Atlantic Ocean to the west, the Pacific Ocean to the east, the Arctic Ocean to the north, and by Africa, the Mediterranean Sea, and the Indian Ocean to the south.  The division between Europe and Asia as two different continents is a historical social construct, with no clear physical separation between them; thus, in some parts of the world, Eurasia is recognized as the largest of five or six continents.  In geology, Eurasia is often considered as a single rigid megablock.  However, the rigidity of Eurasia is debated based on the paleomagnet data.

81st meridian west: The meridian 81° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, the Caribbean Sea, Central America, the Pacific Ocean, South America, the Southern Ocean, and Antarctica to the South Pole.

Supporting paragraphs: Cimarron meridian 37th parallel north
Answer: The Cimarron meridian