Calcareous ooze is the most common biogenous sediment. what makes up calcareous ooze?

When skeletal remains of microscopic organisms make up more than 30% of the sediment, it is called "ooze." ... Calcareous ooze, the most abundant of all biogenous sediments, comes from organisms whose shells (also called tests) are calcium-based, such as those of foraminifera, a type of zooplankton

b. the carbon cycle ensures living things have a source of hydrogen

d. groundwater flows through the subsoil and deposits minerals.