lead

• 2 atomic weights

42:4.12The ex­is­tence of pre-elec­tronic forms of mat­ter is in­di­cated by the two atomic weights of lead. The lead of orig­i­nal for­ma­tion weighs slightly more than that pro­duced through ura­nium dis­in­te­gra­tion by way of ra­dium em­a­na­tions; and this dif­fer­ence in atomic weight rep­re­sents the ac­tual loss of en­ergy in the atomic breakup.

• brought up in lava

58:7.6This stone layer, the old­est fos­sil-bear­ing stra­tum in the crust of the earth, has been crum­pled, folded, and grotesquely twisted as a re­sult of the up­heavals of earth­quakes and the early vol­ca­noes. The lava flows of this age brought much iron, cop­per, and lead up near the plan­e­tary sur­face.

• Silurian deposits

59:3.4It is in the de­posits of this age that much of the gas, oil, zinc, and lead are found, the gas and oil be­ing de­rived from the enor­mous col­lec­tions of veg­etable and an­i­mal mat­ter car­ried down at the time of the pre­vi­ous land sub­mer­gence, while the min­eral de­posits rep­re­sent the sed­i­men­ta­tion of slug­gish bod­ies of wa­ter. Many of the rock salt de­posits be­long to this pe­riod.

• Silurian deposits

59:5.9The wa­ters of many of the in­land seas were so heav­ily charged with lime and other min­er­als as greatly to in­ter­fere with the prog­ress and de­vel­op­ment of many ma­rine species. Even­tu­ally the seas cleared up as the re­sult of an ex­ten­sive stone de­posit, in some places con­tain­ing zinc and lead.