Identify the geological layers represented in Figures 1-4 and explain their composition based on the provided legend.

Geological Layer Representation:

The image displays four diagrams (Рисунок 1, Рисунок 2, Рисунок 3, Рисунок 4) illustrating different geological layer compositions. A legend (УСЛОВНЫЕ ОБОЗНАЧЕНИЯ) is provided at the bottom to interpret these layers.

• Осадочный слой (Sedimentary Layer): Represented by a pattern of small dots and horizontal dashes.
• Гranитный слой (Granite Layer): Represented by a dense pattern of plus signs (++).
• Базальтовый слой (Basalt Layer): Represented by a pattern of inverted 'V' shapes (VVV).

Analysis of Figures:

• Рисунок 1: Shows a sedimentary layer on top, followed by a basalt layer, and then a granite layer at the bottom.
• Рисунок 2: Shows a sedimentary layer on top, followed by a granite layer, and then a basalt layer at the bottom.
• Рисунок 3: Shows a sedimentary layer on top, followed by a basalt layer, and then a granite layer at the bottom. This is identical to Рисунок 1.
• Рисунок 4: Shows a sedimentary layer on top, followed by a granite layer, and then a basalt layer at the bottom. This is identical to Рисунок 2.

Summary: The diagrams illustrate two primary combinations of geological strata: sedimentary over basalt over granite (Figures 1 & 3), and sedimentary over granite over basalt (Figures 2 & 4).