Marl and Tuff Types and Facts

Marl

Tuff

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1 Types

1.1 Types

Clay Marl ,Blue Marl, Red Marl, High Bank Marl, Shell Layer Marl, Under Shell Layer Marl, Sand Marl, Green Marl, Grey Marl and Clayey Marl

Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.

1.2 Features

Generally rough to touch, Is one of the oldest rock, Splintery, Very fine grained rock

Always found as volcanic pipes over deep continental crust

1.3 Archaeological Significance

1.3.1 Monuments

Not Yet Used

Used

1.3.2 Famous Monuments

Not Applicable

Easter Island in the Polynesian Triangle, Pacific Ocean

1.3.3 Sculpture

Used

1.3.4 Famous Sculptures

Data Not Available

1.3.5 Pictographs

Used

1.3.6 Petroglyphs

Used

1.3.7 Figurines

Used

1.4 Fossils

Present

Absent

Types of Marl and Tuff

Some rocks according to their use or texture are classified into different types. Know more about Marl Texture and Tuff Texture. Types of Marl are Clay Marl ,Blue Marl, Red Marl, High Bank Marl, Shell Layer Marl, Under Shell Layer Marl, Sand Marl, Green Marl, Grey Marl and Clayey Marl whereas the types of Tuff are Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite..During historic times, some rocks depending on their hardness were used to create Pictographs and Petroglyphs. Rocks which are hard were generally not used. Pictographs are paintings or drawings that have been placed or created on the surface of rock. Marl and Tuff were used for creating pictographs. Petroglyph is an image which is carved into a rock. These are images created by removing part of a rock surface by incising, picking, carving or abrading, as a form of rock art. Marl and Tuff were used for creating petroglyphs.