Calahorra [pronounced: [kalaˈora]] (Aragonese: Calagorra, Latin: Calagurris) La Rioja, Spain is a municipality in the comarca of Rioja Baja, near the border with Navarre on the right bank of the Ebro. During Ancient Roman times, Calahorra was a municipium known as Calagurris Fibularia.
The city is located on a hill at an altitude of 358 metres at the confluence of the Ebro and Cidacos rivers, and has an area of 91.41 km². Calahorra is the second-largest city in La Rioja in population and importance, after the capital, Logroño. Its population is 21,060 people.
It is well-connected to other cities, especially by highway. It is situated in the Ebro valley, 48 kilometres from Logroño, 120 km from Zaragoza and 180 km from Bilbao, and is connected to these cities by national highway 232, the A-68 motorway (Vasco-Aragonesa) and the Bilbao-Zaragoza rail line.
Its daily bus services link it to such cities as Pamplona, Soria and San Sebastián.
Its status as seat of a comarca and judicial district make it a service-industry city in administrative, commercial and leisure fields.
This is a list of craters on Mars. There are hundreds of thousands of impact craters on Mars, but only some of them have names. This list here only contains named Martian craters starting with the letter A – G (see also lists for H – N and O – Z).
Large Martian craters (greater than 60 km in diameter) are named after famous scientists and science fiction authors; smaller ones (less than 60 km in diameter) get their names from towns on Earth. Craters cannot be named for living people, and small crater names are not intended to be commemorative - that is, a small crater isn't actually named after a specific town on Earth, but rather its name comes at random from a pool of terrestrial place names, with some exceptions made for craters near landing sites. Latitude and longitude are given as planetographic coordinates with west longitude.