What is the 4th event to take place in the grand canyon's geologic history? question 6 options: the shinumo quartzite was deposited in a beach environment. dox sandstone is deposited in a beach environment igneous intrusion. deposition of the bass limestone in a shallow marine environment

The fourth event took place in the "Grand Canyon's" geologic history was "Dox Sandstone is deposited in a beach environment".

Option: B

Explanation:

The geological history of Grand Canyon located in Arizona, USA and involve full-sequenced rock studies on Earth. This arrangement is studied in the form of “ Unkar Group”, involve a layer of sedimentary rock named as “Stratum” from Proterozoic age which is branched into five geologic formations. This process is arranged in the following increasing order: Bass formation > Hakatai Shale > Shinumo Quartzite > Dox Formation > Cardenas Basalt. Here Dox formation is 4th portion which took place in Grand Canyon’s origination, which is a sandstone from Mesoproterozoic rock.

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.