Beachrock in South Jeddah, the Red Sea Coast of Saudi Arabia

الملخص EN

The geomorphological and petrographical characteristics of the beachrock in South Jeddah along the Red Sea Coast of Saudi Arabia, were investigated.

On the basis of the mode of occurrence and genesis, the beachrock is divided into three types, (1) supratidal beachrock, (2) intertidal beachrock, and (3) subtidal beachrock.

The field occurrences and petrography of the beachrock vary from one place to another.

However two types were recognized: quartzose beachrock, and conglomeratic beachrock.

Aragonite and high Mg-calcite are the main carbonate cements in these rocks.