16—Report. 
89. GEOLOGY.Post and. Vicinity: A great mountain range traverses the 
territories of T ay abas,Camarines Norte,camarines Sur and. Albay,which 
has two principal volcanos—Mayon and Bulusan. The smaller volcanic 
mountains are the Malinao,the Iriga and the Isarogqall in the Prov¬ 
ince of 0amarines Sur.The first is composed of dolerite,the second 
of dolerite and olivenite,and the third of andesite and hornblende. 
The eastern volcanic region is prolonged in the Province of Camar- 
ines Norte by Mount Laboo. In this region are found conchiferous lime 
andesite and trachyte in abundance. 
There is a mountain ridge extending from Camarines Norte and 0am¬ 
arines Sur,to Mount Banajao,which is an extinct volcano,and in this 
region tophus,yellow limestone,andesite and coral lime,as well as 
coral reefs,are abundant. 
Diorite,protogenetic gneiss and chloric slate are abundant in the 
Provinces of 0amarines Norte,Albay and Tayabas. 
90. INSECTS: Insects of infinite genera and species are found in hous¬ 
es and surrounding fields,and along banks of stream and river.Centi- 
peds,tarantula and scorpions are not altogether common,the centiped 
being seen most frequently of this trio,varing in length from one 
inch to twelve inches. The common beetle,green beetle(elator noctil- 
ucus),and others of the vaginopennous order;red ants,etc.,are com¬ 
mon. The "anay"a sort of ant very destructive to the woodwork of 
houses,etc,may be found everywhere. The mosquito is also conspicuous 
in all damp and swampy localities. Cockroaches,and many beautiful 
moths and butterflies are abundant,and at certain seasons locusts 
swarm the whole country. 
91. METEORS AND METEORIC SHOWERS.Di scr iption of: Meteoric showers have 
not been observed but sporadic showers are occasionally seen from 
these Headquarters. 
92. MINERALS.Vicinity of: Valuable coal deposits are to be found in 
the Province of Albay and on the Island of Masbate. Gold washings of 
value are to be found in the vicinity of Earacale,Camarines Norte; 
sulphur is found mixed with copper,iron and arsenic near the volcan¬ 
ic regions in the Brigade territory.Gold,silver,iron,antimony,lead 
sulphus,etc.,occur in the form of sulphites in the gold-bearing veins 
in the mountains in the Provinces of Albay and Camarines Norte. 
i, >*■ 
93. PLANTS.Indigenous;Bl oss oming of: The flora of this part of Luzon 
is rich and variegated. The most common of the flowering plants are 
given below in Spanish and Filipino terms: 
» 
T 
N ame. 
Mango stan- 
Palo Maria- 
Halvas de Castilla- 
Gumamila- 
Secreta de Amor- 
C ana- 
Yiang-Ylang- 
Arbol de Fuego- 
Aimendro- 
Lemon de China- 
Cedrela Odorata- 
Lemon site- 
Pili- 
Maran 3 as- 
Manungal- 
Bujo- 
Bilogo- 
Guayabas- 
Blooms. 
August. 4 
November. 4 
September. 
June. 4 
May. t 
M ay. 4 
May. 4 
March. t 
J une. 4 
J une. 4 
April. 4 
April. 4 
August. 4 
June and September. 4 
February. 4 
September. 4 
April. 4 
May. 4 
