1 Overnight temperatures are generally quite mild with an average low of 11.4 Â°C (52.5 Â°F). 2  The mean diurnal temperature variation/ range in July is 7.5 Â°C (13.5 Â°F).  The weather in July is slightly dry with rain periodically. Only 50mm (2in) of H2O is deposited across an average of 17 days.
Chemical sedimentary rock forms when mineral constituents in solution become supersaturated and inorganically precipitate. Common chemical sedimentary rocks include oolitic limestone and rocks composed of evaporite minerals such as halite (rock salt), sylvite, barite and gypsum.
Sedimentary rocks can be divided into two major categories: clastic and precipitated (or chemical). Since the character of the sedimentary rock is largely controlled by the sedimentary environment, they have a story to tell about the climate, the environment, and even who lived at the time they were laid down. Reading the book of sedimentary rocks is one of the fun things to do in geology. Clastic sediments