Meaning: Characteristic of informal spoken language or conversation. Synonyms: colloquial; conversational. Context examples: wrote her letters in a colloquial style / the broken syntax and casual enunciation of conversational English. Similar: informal (used of spoken and written language)
Location of the Mariana Trench. The Mariana Trench or Marianas Trench is the deepest part of the world's oceans. It is located in the western Pacific Ocean, an average of 124 miles/200km to the east of the Mariana Islands, in the Western Pacific East of Philippines. The trench is about 2,550 kilometres (1,580 mi) long with an average width of 69 kilometres (43 mi).
Oceanic trench. Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. Oceanic trenches are topographic depressions of the sea floor, relatively narrow in width, but very long. These oceanographic features are the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few millimeters to over ten centimeters per year. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lit