CHAPTER II. The Physical Features of the Congo.

 Roughly we may describe the Basin of the Congo as extending from the 5th degree of North, to the 12th degree of South, latitude¹, and from the hills skirting the coast of the Atlantic Ocean to 31st or 32nd degree of East longitude².

 

Along what is known as the South-West Coast of Africa, from the Gulf³ of Biafra southwards, stretches a ridge⁴ of hill country. It commences about fifty to seventy miles inland, and is about 300 miles in width. In some parts it attains⁵ an elevation⁶ of 5,000 or more feet, but the general altitude near the Congo is from 2,000 to 2,500 above the level of the sea. It is really a belt or elevated plateau; rich soil is to be found on the summits of the ‘hills,’ but the whole has been torn and worn by the rains; little streams have in time cut out deep gorges⁸, the sides of which are being further eroded⁹, until what was once a rolling table-land appears as a chaos¹⁰ of hills; only from a21 few heights can one gain a fair idea of the nature of the country.

This plateau belt forms the western watershed¹¹ of the Congo River, and on its seaward slopes gives rise to many unimportant streams, of which the Cameroons, Gaboon, Ogowai, Kwilu, Chiloango, Mbidiji, (Ambrize), Loje, and Kwanza are the principal. The Ogowai is the most important, and has been explored by M. de Brazza for the French Government, which has now annexed¹² its entire basin. It is navigable for some 150 miles for vessels¹³ of light draught¹⁴; but beyond its course is much impeded¹⁵ by cataracts¹⁷.

This water-torn plateau country, with its little useless rivers, has presented a formidable obstacle to exploration, and has served to throw all interior water into the Congo. To the north of the Great Basin stretches the high lands of the unknown countries which form also the watershed of the Shari and the Nile. Eastward¹⁸ stretches the hill country on the west of the Victoria and Albert Nyanza, and on the east of Tanganika, while to the south is the watershed of the Zambesi.

This great circle of hills probably enclosed at one time an immense fresh-water lake, of an area of a million and a half square miles, which at length, overflowing¹⁹ at its weakest point, formed22 the outlet²⁰ which we to-day call the Congo River. The immense flood thus released tore out the deep gorge⁷, which is now 1,000 and 1,500 feet below the main level. There are signs in some parts of changes in its course, one notably²¹ in the Bundi valley, thirty-five miles from Vivi, which was at one time undoubtedly²² a channel of the Congo; there are other valleys also presenting that appearance, the levels, entrances, and exits of which would lead one to conclude that such had been the case.

If a transverse section were taken about the middle of the cataract¹⁶ region, there would be first an ascent²³ from the river, almost perpendicular²⁴, of from 300 to 500 feet in about one-third of a mile, then a much steadier rise of some 500 to 700 feet in two miles, and then a rise of another 500 to 700 feet in eight miles, with a further steady rise for five miles, so that the actual valley in the cataract region might be estimated roughly at from twenty to thirty miles in breadth. The river itself varies from 300 yards to one-and-a-half or two miles wide at mid-flood; while the difference between the highest water of the rainy season and the lowest in the dry season, varies from forty feet in the worst parts to about three feet on the lower river.

To the geologist²⁵ the country between the coast23 and Stanley Pool is best studied along the river. The first low hills approach near to the mouth of the river, which is about seven miles wide, and devoid²⁶ of a delta²⁷; the next step in the plateau occurs at five miles west of Mboma, fifty miles from the coast, where the tops of the ‘hills’ are from 500 to 700 feet in height. There we find a red clay yielding copal above granitic²⁸ rocks. The banks grow steeper and the river narrows, until at Vivi the first serious obstacle is met, the plateau level being about 1,700 feet, and the river about 600 yards wide. Just above this is the fierce Yelala Cataract; indeed, nowhere can you properly speak of falls; a drop of fifty feet, which would be a fine scene on an ordinary river, is almost disregarded by the Congo. The bed of a cataract must be of very hard rock, and down this inclined plane, the river, nipped tightly by the hills, rushes with fearful velocity²⁹, leaping in mad waves, foaming³⁰ and raging at its rocky obstacles. In some of the milder cataracts it rushes down a swirling³² mound³³ of water, which projected into the quieter low level at the foot of the cataract, races on as a heap of waters for nearly half a mile, before it consents to swirl³¹ about at the lower level. Fierce up currents run along the shore at such points, which would draw boats or canoes into the24 swirling current, while along the edges of these counter-currents are great whirlpools, giving way to each other, disappearing, and breaking up into ‘caldrons,’ the whole surface heaving and seething³⁴. In a creek³⁵ three miles below the Ntombo Cataract we have watched this heaving. The water would flow outwards³⁶ from the creek, then meeting the impulse of a fresh heave, would flow back until it would remain stationary³⁷ for some twenty seconds, often two feet higher than what it was a minute ago. This flows backwards³⁸ and forwards in the creek, recurring³⁹ every two minutes or minute and a half.

 

A LOAD.

At Vivi the country is much eroded, granitic rocks, schist, mica⁴⁰, gneiss, and quartz⁴¹ are exposed. The hill-sides are rock strewn, and the country is wild and desolate⁴², covered with weak grass and stunted⁴³ gnarled trees. In the more level spots rich soil has collected, and the natives cultivate there their cassava, ground-nuts, etc. This is the nature of the country for the next fifty miles. Near the river a chaos of hills, further away rolling plateau, covered with strong grass and stunted trees. The tops of these nzanza, by Mr. Stanley’s careful survey, vary but fifty feet over stretches of forty miles. Above Isangila limestone⁴⁴ crops up with slaty⁴⁵ rocks, the main level25 near the river is lower, and traversed by straight ridges⁴⁶ of hills running parallel with the coast, and from five to ten miles apart. Clear of the limestone, the country is once more a torn plateau, slate⁴⁷ and shale⁴⁸ abound⁴⁹, until at 200 miles from26 the coast occurs a very marked step of 700 feet. Here the country is from 2,300 to 2,500 feet above the sea, and continues so, the rock being a red or purple sandstone. Several higher ridges cross the country as you near Stanley Pool, cut abruptly⁵⁰ by the gorge of the river, and continued on beyond. Stanley Pool is a widening out of the river in a weak point among the hills, which marks the head of the cataract region, the water level being about 1,000 feet above the sea. The plateau country continues for a further 150 miles, when hills disappear, and the main level appears to be about 1,100 feet above the sea. From Irebu, 250 miles above the Pool, to Stanley Falls, the banks are forest-clad. The country then divides itself into three regions between the coast and Stanley Falls. The lower river 100 miles, cataract region 200 miles (nearly 300 miles in winding⁵¹ course), the upper river 1,060 miles. Or coast level fifty miles, plateau level 400 miles, central level 900 miles, of which 800 miles are forest-clad banks.

The cataract region is the obstacle that has kept so long secret this great highway; but that passed, on the upper river there are 1,100 miles of unimpeded navigation, while the affluents⁵² are estimated at 2,000 miles; beyond the Stanley Falls stretch another 2,000 miles of riverway. Two of27 the affluents have been explored, and on each was found a lake, while the natives at the mouths of other affluents speak of lakes. It is highly probable that further explorations will reveal other lake regions, all available to the steamers and boats on the upper river.

Communications interiorwards are certain; but between the coast and Stanley Pool everything must be transported on men’s heads, until there shall be a railway. The roads are mere⁵³ footpaths⁵⁴ over the hills from town to town; while the tall thick grass is so strong that it must be hoed up and the bushes cleared before any wheeled carriage could be used. Then again the country is so torn, and streams in their deep gorges so abundant, that travelling is very largely a series of ascents⁵⁵ and descents.

1 latitude   

n.纬度，行动或言论的自由(范围)，(pl.)地区

参考例句：

• The latitude of the island is 20 degrees south.该岛的纬度是南纬20度。
• The two cities are at approximately the same latitude.这两个城市差不多位于同一纬度上。

2 longitude   

n.经线，经度

参考例句：

• The city is at longitude 21°east.这个城市位于东经21度。
• He noted the latitude and longitude,then made a mark on the admiralty chart.他记下纬度和经度，然后在航海图上做了个标记。

3 gulf   

n.海湾；深渊，鸿沟；分歧，隔阂

参考例句：

• The gulf between the two leaders cannot be bridged.两位领导人之间的鸿沟难以跨越。
• There is a gulf between the two cities.这两座城市间有个海湾。

4 ridge   

n.山脊；鼻梁；分水岭

参考例句：

• We clambered up the hillside to the ridge above.我们沿着山坡费力地爬上了山脊。
• The infantry were advancing to attack the ridge.步兵部队正在向前挺进攻打山脊。

5 attains   

（通常经过努力）实现( attain的第三人称单数 )； 达到； 获得； 达到（某年龄、水平、状况）

参考例句：

• This is the period at which the body attains maturity. 这是身体发育成熟的时期。
• The temperature a star attains is determined by its mass. 恒星所达到的温度取决于它的质量。

6 elevation   

n.高度；海拔；高地；上升；提高

参考例句：

• The house is at an elevation of 2,000 metres.那幢房子位于海拔两千米的高处。
• His elevation to the position of General Manager was announced yesterday.昨天宣布他晋升总经理职位。

7 gorge   

n.咽喉，胃，暴食，山峡；v.塞饱，狼吞虎咽地吃

参考例句：

• East of the gorge leveled out.峡谷东面地势变得平坦起来。
• It made my gorge rise to hear the news.这消息令我作呕。

8 gorges   

n.山峡，峡谷( gorge的名词复数 )；咽喉v.（用食物把自己）塞饱，填饱( gorge的第三人称单数 )；作呕

参考例句：

• The explorers were confronted with gorges(that were)almost impassable and rivers(that were)often unfordable. 探险人员面临着几乎是无路可通的峡谷和常常是无法渡过的河流。 来自辞典例句
• We visited the Yangtse Gorges last summer. 去年夏天我们游历了长江三峡。 来自辞典例句

9 eroded   

adj. 被侵蚀的，有蚀痕的 动词erode的过去式和过去分词形式

参考例句：

• The cliff face has been steadily eroded by the sea. 峭壁表面逐渐被海水侵蚀。
• The stream eroded a channel in the solid rock. 小溪在硬石中侵蚀成一条水道。

10 chaos   

n.混乱，无秩序

参考例句：

• After the failure of electricity supply the city was in chaos.停电后，城市一片混乱。
• The typhoon left chaos behind it.台风后一片混乱。

11 watershed   

n.转折点，分水岭，分界线

参考例句：

• Our marriage was at a watershed.我们的婚姻到了一个转折关头。
• It forms the watershed between the two rivers.它成了两条河流的分水岭。

12 annexed   

[法] 附加的，附属的

参考例句：

• Germany annexed Austria in 1938. 1938年德国吞并了奥地利。
• The outlying villages were formally annexed by the town last year. 那些偏远的村庄于去年正式被并入该镇。

13 vessels   

n.血管( vessel的名词复数 )；船；容器；（具有特殊品质或接受特殊品质的）人

参考例句：

• The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。 来自《简明英汉词典》
• All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。 来自《现代汉英综合大词典》

14 draught   

n.拉，牵引，拖；一网（饮，吸，阵)；顿服药量，通风；v.起草，设计

参考例句：

• He emptied his glass at one draught.他将杯中物一饮而尽。
• It's a pity the room has no north window and you don't get a draught.可惜这房间没北窗，没有过堂风。

15 impeded   

阻碍，妨碍，阻止( impede的过去式和过去分词 )

参考例句：

• Work on the building was impeded by severe weather. 楼房的施工因天气恶劣而停了下来。
• He was impeded in his work. 他的工作受阻。

16 cataract   

n.大瀑布，奔流，洪水，白内障

参考例句：

• He is an elderly gentleman who had had a cataract operation.他是一位曾经动过白内障手术的老人。
• The way is blocked by the tall cataract.高悬的大瀑布挡住了去路。

17 cataracts   

n.大瀑布( cataract的名词复数 )；白内障

参考例句：

• The rotor cataracts water over the top of the machines. 回转轮将水从机器顶上注入。 来自《现代英汉综合大词典》
• Cataracts of rain flooded the streets. 倾盆大雨弄得街道淹水。 来自辞典例句

18 eastward   

adv.向东；adj.向东的；n.东方，东部

参考例句：

• The river here tends eastward.这条河从这里向东流。
• The crowd is heading eastward,believing that they can find gold there.人群正在向东移去，他们认为在那里可以找到黄金。

19 overflowing   

n. 溢出物,溢流 adj. 充沛的，充满的 动词overflow的现在分词形式

参考例句：

• The stands were overflowing with farm and sideline products. 集市上农副产品非常丰富。
• The milk is overflowing. 牛奶溢出来了。

20 outlet   

n.出口/路；销路；批发商店；通风口；发泄

参考例句：

• The outlet of a water pipe was blocked.水管的出水口堵住了。
• Running is a good outlet for his energy.跑步是他发泄过剩精力的好方法。

21 notably   

adv.值得注意地，显著地，尤其地，特别地

参考例句：

• Many students were absent,notably the monitor.许多学生缺席，特别是连班长也没来。
• A notably short,silver-haired man,he plays basketball with his staff several times a week.他个子明显较为矮小，一头银发，每周都会和他的员工一起打几次篮球。

22 undoubtedly   

adv.确实地，无疑地

参考例句：

• It is undoubtedly she who has said that.这话明明是她说的。
• He is undoubtedly the pride of China.毫无疑问他是中国的骄傲。

23 ascent   

n.(声望或地位)提高；上升，升高；登高

参考例句：

• His rapid ascent in the social scale was surprising.他的社会地位提高之迅速令人吃惊。
• Burke pushed the button and the elevator began its slow ascent.伯克按动电钮，电梯开始缓慢上升。

24 perpendicular   

adj.垂直的，直立的；n.垂直线，垂直的位置

参考例句：

• The two lines of bones are set perpendicular to one another.这两排骨头相互垂直。
• The wall is out of the perpendicular.这墙有些倾斜。

25 geologist   

n.地质学家

参考例句：

• The geologist found many uncovered fossils in the valley.在那山谷里，地质学家发现了许多裸露的化石。
• He was a geologist,rated by his cronies as the best in the business.他是一位地质学家，被他的老朋友们看做是这门行当中最好的一位。

26 devoid   

adj.全无的，缺乏的

参考例句：

• He is completely devoid of humour.他十分缺乏幽默。
• The house is totally devoid of furniture.这所房子里什么家具都没有。

27 delta   

n.（流的）角洲

参考例句：

• He has been to the delta of the Nile.他曾去过尼罗河三角洲。
• The Nile divides at its mouth and forms a delta.尼罗河在河口分岔，形成了一个三角洲。

28 granitic   

花岗石的，由花岗岩形成的

参考例句：

• A batholith has been defined as a huge intrusive mass of granitic rock. 岩基的定义是巨大的花岗石侵入岩体。
• A granitic rock composed chiefly of quartz and mica. 一种由石英和云母构成的花岗石。

29 velocity   

n.速度，速率

参考例句：

• Einstein's theory links energy with mass and velocity of light.爱因斯坦的理论把能量同质量和光速联系起来。
• The velocity of light is about 300000 kilometres per second.光速约为每秒300000公里。

30 foaming   

adj.布满泡沫的；发泡

参考例句：

• He looked like a madman, foaming at the mouth. 他口吐白沫，看上去像个疯子。 来自《简明英汉词典》
• He is foaming at the mouth about the committee's decision. 他正为委员会的决定大发其火。 来自《简明英汉词典》

31 swirl   

v.(使)打漩，(使)涡卷；n.漩涡，螺旋形

参考例句：

• The car raced roughly along in a swirl of pink dust.汽车在一股粉红色尘土的漩涡中颠簸着快速前进。
• You could lie up there,watching the flakes swirl past.你可以躺在那儿，看着雪花飘飘。

32 swirling   

v.旋转，打旋( swirl的现在分词 )

参考例句：

• Snowflakes were swirling in the air. 天空飘洒着雪花。 来自《现代汉英综合大词典》
• She smiled, swirling the wine in her glass. 她微笑着，旋动着杯子里的葡萄酒。 来自辞典例句

33 mound   

n.土墩，堤，小山；v.筑堤，用土堆防卫

参考例句：

• The explorers climbed a mound to survey the land around them.勘探者爬上土丘去勘测周围的土地。
• The mound can be used as our screen.这个土丘可做我们的掩蔽物。

34 seething   

沸腾的，火热的

参考例句：

• The stadium was a seething cauldron of emotion. 体育场内群情沸腾。
• The meeting hall was seething at once. 会场上顿时沸腾起来了。

35 creek   

n.小溪，小河，小湾

参考例句：

• He sprang through the creek.他跳过小河。
• People sunbathe in the nude on the rocks above the creek.人们在露出小溪的岩石上裸体晒日光浴。

36 outwards   

adj.外面的，公开的，向外的；adv.向外；n.外形

参考例句：

• Does this door open inwards or outwards?这门朝里开还是朝外开？
• In lapping up a fur,they always put the inner side outwards.卷毛皮时，他们总是让内层朝外。

37 stationary   

adj.固定的，静止不动的

参考例句：

• A stationary object is easy to be aimed at.一个静止不动的物体是容易瞄准的。
• Wait until the bus is stationary before you get off.你要等公共汽车停稳了再下车。

38 backwards   

adv.往回地，向原处，倒，相反，前后倒置地

参考例句：

• He turned on the light and began to pace backwards and forwards.他打开电灯并开始走来走去。
• All the girls fell over backwards to get the party ready.姑娘们迫不及待地为聚会做准备。

39 recurring   

adj.往复的，再次发生的

参考例句：

• This kind of problem is recurring often. 这类问题经常发生。
• For our own country, it has been a time for recurring trial. 就我们国家而言，它经过了一个反复考验的时期。

40 mica   

n.云母

参考例句：

• It could not pass through material impervious to water such as mica.它不能通过云母这样的不透水的物质。
• Because of its layered structure,mica is fissile.因为是层状结构，云母很容易分成片。

41 quartz   

n.石英

参考例句：

• There is a great deal quartz in those mountains.那些山里蕴藏着大量石英。
• The quartz watch keeps good time.石英表走时准。

42 desolate   

adj.荒凉的，荒芜的；孤独的，凄凉的；v.使荒芜，使孤寂

参考例句：

• The city was burned into a desolate waste.那座城市被烧成一片废墟。
• We all felt absolutely desolate when she left.她走后，我们都觉得万分孤寂。

43 stunted   

adj.矮小的；发育迟缓的

参考例句：

• the stunted lives of children deprived of education 未受教育的孩子所过的局限生活
• But the landed oligarchy had stunted the country's democratic development for generations. 但是好几代以来土地寡头的统治阻碍了这个国家民主的发展。

44 limestone   

n.石灰石

参考例句：

• Limestone is often used in building construction.石灰岩常用于建筑。
• Cement is made from limestone.水泥是由石灰石制成的。

45 slaty   

石板一样的，石板色的

参考例句：

• A sudden gust of cool wind under the slaty sky, and rain drops will start patter-pattering. 在灰沉沉的天底下，忽而来一阵凉风，便息列索落地下起雨来了。 来自汉英文学 - 散文英译
• A metamorphic rock intermediate between shale and slate, that does not possess true slaty cleavage. 一种细颗粒的变质岩，由泥质岩受热形成。

46 ridges   

n.脊( ridge的名词复数 )；山脊；脊状突起；大气层的)高压脊

参考例句：

• The path winds along mountain ridges. 峰回路转。
• Perhaps that was the deepest truth in Ridges's nature. 在里奇斯的思想上，这大概可以算是天经地义第一条了。

47 slate   

n.板岩，石板，石片，石板色，候选人名单；adj.暗蓝灰色的，含板岩的；vt.用石板覆盖，痛打，提名，预订

参考例句：

• The nominating committee laid its slate before the board.提名委员会把候选人名单提交全体委员会讨论。
• What kind of job uses stained wood and slate? 什么工作会接触木头污浊和石板呢？

48 shale   

n.页岩，泥板岩

参考例句：

• We can extract oil from shale.我们可以从页岩中提取石油。
• Most of the rock in this mountain is shale.这座山上大部分的岩石都是页岩。

49 abound   

vi.大量存在；(in，with)充满，富于

参考例句：

• Oranges abound here all the year round.这里一年到头都有很多橙子。
• But problems abound in the management of State-owned companies.但是在国有企业的管理中仍然存在不少问题。

50 abruptly   

adv.突然地，出其不意地

参考例句：

• He gestured abruptly for Virginia to get in the car.他粗鲁地示意弗吉尼亚上车。
• I was abruptly notified that a half-hour speech was expected of me.我突然被通知要讲半个小时的话。

51 winding   

n.绕，缠，绕组，线圈

参考例句：

• A winding lane led down towards the river.一条弯弯曲曲的小路通向河边。
• The winding trail caused us to lose our orientation.迂回曲折的小道使我们迷失了方向。

52 affluents   

n.富裕的，富足的( affluent的名词复数 )

参考例句：

53 mere   

adj.纯粹的；仅仅，只不过

参考例句：

• That is a mere repetition of what you said before.那不过是重复了你以前讲的话。
• It's a mere waste of time waiting any longer.再等下去纯粹是浪费时间。

54 footpaths   

人行小径，人行道( footpath的名词复数 )

参考例句：

• There are a lot of winding footpaths in the col. 山坳里尽是些曲曲弯弯的羊肠小道。
• There are many footpaths that wind through the village. 有许多小径穿过村子。

55 ascents   

n.上升( ascent的名词复数 )；（身份、地位等的）提高；上坡路；攀登

参考例句：

• The cart was very heavy, and in addition, there were many ascents. 这辆车实在难拉，而且又很重，还得上许多坡。 来自互联网
• Balloon ascents overcome this hazard with ease. 升空的气球能轻而易举地克服这一困难。 来自互联网