Disturb disturbance disturbed

1. Any change in the normal bedding of a seam (fault or fold)
is called a....

2. Coal seams may be structurally... by faulting or folding.

3. Folds... coal seams without a break and sometimes faults...
them with a break.

33. Определите число выделенных существительных:

these men; 25 feet, natural phenomenon; their analyses; higher educational establishments; coal stratum; new formula; these apparatuses; the data of investigations

34. Прочитайте предложения, найдите в них -ing-формы. Скажите, как
они называются и в какой функции употреблены в предложении. Переведите
предложения.

1. Coal beds may consist of different bands of varying thickness.

2. Laser is used in mining. This is a more recent development
replacing theodolites in surveying.

3. Speaking about the future of coal, it is necessary to note the
production of liquid fuels such as gas and oil from coal.

35. Переведите предложения, обращая внимание на перевод -teg-форм.
Как называются эти формы? Каковы нх функции?

а)1. The highest output of coal excluding seams of 6° to 15° is got from thick seams.

2. The ventilation air flowing through the mine has been
greatly increased.

3. It should be noticed that the theory of prospecting and ex­
ploration is a link connecting specialists in two fields of mining: the
exploration geologist and the mining engineer.

4. Folds, faults and fissures influencing the distribution and lo­
calization of mineralization are observed in practically all ore fields.

6)1. Minerals and rocks are subjected to a process of constant development depending on geological conditions.

2. Studying and exploring deep deposits, it is important to es-

156_____________________________________________ Unit 6

tablish the relation between the structures of different sequences (последовательность) controlling their localization.

3. Geophysical methods sometimes make it possible to deter­
mine the thickness of iron ore deposits, and under favourable con­
ditions even to establish the composition of the ores as well, thereby
decreasing the number of exploratory openings to a minimum.

4. Depending on the structural conditions, there are several
types of ore fields.

в)1. Studies of intrusive dykes are most important when investi­gating the structure of ore field and establishing the genesis of the deposit.

2. While studying at the engineering institutes, every student is
to go through practical training at mines, open-pits, quarries or
dressing plants.

3. When making the geological map, the geologists study all
the data of ground and aerial geological surveys.

36. Выразите несогласие и подтвердите свою точку зрения фактами из
текста Б. Используйте предлагаемые разговорные формулы: