2. Укажите, какие предложения соответствуют содержанию текста. Подтвердите свои ответы фактами из текста.

1. Generally speaking, metamorphic rocks have been developed from ores.

2. Marble, slate and phyllite belong to the group of metamor­phic rocks.

3. As is known, unlike granite metamorphic rocks have a schis­tose structure.

4. It is obvious that the role of water in metamorphism is great.

5. As a rule, low-grade metamorphic rocks are characterized by the absence of water.

6. Flaky materials cause the rock to split into thin sheets.

7. It should be noted that marble and quartzite are foliated metamorphic rocks.

8. The structure of metamorphic rocks shows the nature of older pre­-existing rocks and the mechanism of metamorphic deformation as well.

9. All metamorphic rocks are non-foliated.

3. Письменно ответьте на следующие вопросы по тексту:

1. Do you know how metamorphic rocks have been formed?

2. Which rocks belong to the group of metamorphic?

3. Does gneiss have the same structure as granite?

4. Is the role of water great in metamorphism?

5. What rocks do we call foliated? What can you say about non-foliated metamorphic rocks?

6. How can geologists trace the original structure of metamorphic rocks?

7. Why are metamorphic rocks often called crystalline schists?

4. Найдите в правой колонке русские эквиваленты следующих слов и словосочетаний и выпишите их:

as a result of the chemical and physical changes	полоса (или прослоек) угля
constituents of rocks	составляющие пород
to be subjected to constant development	расщепляться на отдельные слои
to undergo changes	вообще говоря
excess of water	в результате химических и физических изменений
low-grade ores	избыток воды
coal band	изменяться
to cleave into separate layers	находиться в постоянном развитии
traces of original structure	низкосортные руды
generally speaking	следы первоначальной структуры

5. Заполните пропуски в предложениях, используя приведенные слова:

relate related relationship relating (to)

1. The ... between rock pressure and temperature is interdepen­dent.

2. The role of water in metamorphism can be characterized at least by four variable geologically ... parameters.

3. These parameters ... to each other.

4. At the Institute the students study the full range of subjects ... to mining, geology as well as mining mechanics.