premise: Sierra Morena is the Spanish name for a mountain range.
hypothesis: Sierra Azul . It is the southern half of the Santa Cruz Mountains range , which is divided into two parts by California Highway 17 into what the colonizing Spanish called the Sierra Morena or `` Brown Mountains '' to the north and the Sierra Azul or `` Blue Mountains '' to the south . The Sierra Morena is one of the main systems of mountain ranges in Spain . Sierra Morena ( English translation : Brown Mountain Range ) is a Cuban village and consejo popular ( people 's council ) of the municipality of Corralillo , Villa Clara Province .