Zastosowanie zdjęć stereoskopowy.ch do opisu skamieniałości
Abstract
THE USE OF STEREOSCOPE PHOTOS IN DESCRIPTIONS OF FOSSILS
Summary
The paper deals with the methods of taking stereoscopic photos and the possibilities of us e of stereopairs in descriptions of fossils. References are given to several papers presenting various methods of making stereopairs and examples of stereoscope photos of fossils such as foraminifers, conodonts, ostracods, sponge spicules, juvenile gastropods, bivalves, brachiopods, trilobites, corals, and vertebrates.
In order to obtain stereopairs, a method involving parallel shift of an object was used in my studies on Oxfordian ammonites. It was found that the magnitude of horizontal shift of a specimen (b) may be approximately defined by the formula: b = 0.1× R, where R is the distance between the specimen and lens.
The methods of obtaining stereoscope effect with the use of stereoscope and without any auxiliary devices are discussed. Depending on arrangement of left and right photos in relation to one another, there may be obtained three kinds of effects: normal, pseudoscope, and zero effects. The pseudoscope effect (resulting in mould-like appearance of an imprint) was found to be advantageous in identification of macrofaunal remains in core material.
Summary
The paper deals with the methods of taking stereoscopic photos and the possibilities of us e of stereopairs in descriptions of fossils. References are given to several papers presenting various methods of making stereopairs and examples of stereoscope photos of fossils such as foraminifers, conodonts, ostracods, sponge spicules, juvenile gastropods, bivalves, brachiopods, trilobites, corals, and vertebrates.
In order to obtain stereopairs, a method involving parallel shift of an object was used in my studies on Oxfordian ammonites. It was found that the magnitude of horizontal shift of a specimen (b) may be approximately defined by the formula: b = 0.1× R, where R is the distance between the specimen and lens.
The methods of obtaining stereoscope effect with the use of stereoscope and without any auxiliary devices are discussed. Depending on arrangement of left and right photos in relation to one another, there may be obtained three kinds of effects: normal, pseudoscope, and zero effects. The pseudoscope effect (resulting in mould-like appearance of an imprint) was found to be advantageous in identification of macrofaunal remains in core material.